Pyridazinone derivatives

ABSTRACT

This invention provides pyridazinone derivatives encompassed by the following the formula:                    
     wherein, R 1 , R 2 , R 3 , R 4 , R 5  and R 7  represent a hydrogen atom and the like, and R 6  represents a C 1 -C 3  alkyl and the like. The pyridazinone derivatives have excellent herbicidal activity, therefore, they can be used as an active ingredient for herbicidal compositions and can be utilized in herbicidal method, which are also described.

This application is a divisional of Application No. 09/275,266 filed onMar. 23, 1999, which has matured into U.S. Pat. No. 6,187,920, theentire content of which is hereby incorporated by reference.

FIELD OF THE INVENTION

The present invention relates to pyridazinone derivatives and the use ofthe said pyridazinone.

The object of the present invention is to provide compounds havingexcellent herbicidal activity.

SUMMARY OF THE INVENTION

The present inventor has intensely studied to seek out compounds thathave excellent herbicidal activity, as a result, and has found that thepyridazinone derivatives encompassed by Chemical Formula 3 below,possess an excellent herbicidal activity, and arrived at the presentinvention. Accordingly, the present invention provides pyridazinonederivatives (hereinafter, the present invention compound) encompassed bythe formula:

wherein, R¹ represents hydrogen, halogen, C₁-C₃ alkyl or C₁-C₃haloalkyl;

R² represents hydrogen, halogen, C₁-C₆ alkyl, C₁-C₆ haloalkyl, OR⁸, SR⁹,NHR¹⁰, COOR¹¹, COR¹², SO₂R¹³, NO₂ or CN;

R³represents hydrogen, halogen, C₁-C₆ alkyl, C₁-C₆ haloalkyl, C₁-C₃alkoxy C₁-C₃ alkyl, OR⁸, SR⁹, NHR¹⁰, COOR¹¹, COR¹², SO₂R¹³,C(R¹²¹)═C(R¹⁴)(R¹⁵), NO₂ or CN;

R⁴ represents hydrogen, halogen, C₁-C₆ alkyl, C₁-C₆ haloalkyl, C₁-C₃alkoxy C₁-C₃ alkyl, OR⁸, SR⁹, NHR¹⁰, COOR¹¹, COR¹², SO₂R¹³,C(R¹²¹)═C(R¹⁴)(R¹⁵), C(R¹⁶)═NOR¹⁷, NO₂ or CN;

R⁵ represents hydrogen, halogen or C₁-C₃ alkyl;

R⁶ represents C₁-C₃ alkyl or C₁-C₃ haloalkyl;

R⁵ and R⁶ may have each end bonded to each other to form trimethylenethat may be substituted with fluorine(s) or tetramethylene that may besubstituted with fluorine(s);

R⁷ represents hydrogen, halogen, or C₁-C₃ alkyl; and in which;

R⁸represents hydrogen, a C₁-C₁₀ alkyl, C₁-C₁₀ haloalkyl, C₃-C₈ alkenyl,C₃-C₈ haloalkenyl,C₃-C₈ alkynyl, C₃-C₈ haloalkynyl, C₃-C₁₀ cycloalkyl,C₃-C₁₀ cyclohaloalkyl, C₃-C₁₀ cycloalkenyl, C₃-C₁₀ cyclohaloalkenyl,C₃-C₁₀ cycloalkyl C₁-C₃ alkyl, C₃-C₁₀ cyclohaloalkyl C₁-C₃ alkyl, C₃-C₁₀cycloalkenyl C₁-C₃ alkyl, C₃-C₁₀cyclohaloalkenyl C₁-C₃ alkyl, C₁-C₅alkylcarbonyl, C₁-C₅ haloalkylcarbonyl, C₃-C₆ cycloalkylcarbonyl, C₃-C₆cyclohaloalkylcarbonyl, C₁-C₆ alkylcarbonyl C₁-C₆ alkyl, C₁-C₆haloalkylcarbonyl C₁-C₆ alkyl, C₁-C₆ alkoxycarbonyl, C₁-C₆haloalkoxycarbonyl, C₃-C₁₀ cycloalkoxycarbonyl, C₃-C₁₀cyclohaloalkoxycarbonyl, C₁-C₁₀ alkoxycarbonyl C₁-C₅ alkyl, C₁-C₁₀haloalkoxycarbonyl C₁-C₅ alkyl, C₃-C₁₀ cycloalkoxycarbonyl C₁-C₅ alkyl,C₃-C₁₀ cyclohaloalkoxycarbonyl C₁-C₅ alkyl, C₁-C₆ alkoxy C₁-C₆ alkyl,C₁-C₆ haloalkoxy C₁-C₆ alkyl, C₁-C₆ alkylthio C₁-C₆ alkyl, C₁-C₆haloalkylthio C₁-C₆ alkyl, cyano C₁-C₄ alkyl, aryl that may have asubstituent or substituents, aryl C₁-C₃ alkyl that may have asubstituent or substituents, arylcarbonyl that may have a substituent orsubstituents, SO₂R²⁰, CH₂C(═O)CO₂R⁴¹, CH(CH₃)C(═O)CO₂R⁴¹,CH₂C(═NOR⁴²)CO₂R⁴¹ or CH(CH₃)C(═NOR⁴²)CO₂R⁴¹;

R⁹ represents hydrogen, C₁-C₁₀ alkyl, C₁-C₁₀ haloalkyl, C₃-C₈ alkenyl,C₃-C₈ haloalkenyl, C₃-C₈ alkynyl, C₃-C₈ haloalkynyl, C₃-C₁₀ cycloalkyl,C₃-C₁₀ cyclohaloalkyl, C₃-C₁₀ cycloalkenyl, C₃-C₁₀ cyclohaloalkenyl,C₃-C₁₀ cycloalkyl C₁-C₃ alkyl, C₃-C₁₀ cyclohaloalkyl C₁-C₃ alkyl, C₃-C₁₀cycloalkenyl C₁-C₃ alkyl, C₃-C₁₀cyclohaloalkenyl C₁-C₃ alkyl, C₁-C₅alkylcarbonyl, C₁-C₅ haloalkylcarbonyl, C₃-C₆ cycloalkylcarbonyl, C₃-C₆cyclohaloalkylcarbonyl, C₁-C₆ alkylcarbonyl C₁-C₆ alkyl, C₁-C₆haloalkylcarbonyl C₁-C₆ alkyl, C₁-C₆ alkoxycarbonyl, C₁-C₆haloalkoxycarbonyl, C₃-C₁₀ cycloalkoxycarbonyl, C₃-C₁₀cyclohaloalkoxycarbonyl, C₁-C₁₀ alkoxycarbonyl C₁-C₅ alkyl, C₁-C₁₀haloalkoxycarbonyl C₁-C₅ alkyl, C₃-C₁₀ cycloalkoxycarbonyl C₁-C₅ alkyl,C₃-C₁₀ cyclohaloalkoxycarbonyl C₁-C₅ alkyl, C₁-C₆ alkoxy C₁-C₆ alkyl,C₁-C₆ haloalkoxy C₁-C₆ alkyl, C₁-C₆ alkylthio C₁-C₆ alkyl, C₁-C₆haloalkylthio C₁-C₆ alkyl, cyano C₁-C₄ alkyl, aryl that may have asubstituent or substituents, aryl C₁-C₃ alkyl that may have asubstituent or substituents, arylcarbonyl group that may have asubstituent or substituents, CH₂C(═O)CO₂R⁴¹, CH(CH₃)C(═O)CO₂R⁴¹,CH₂C(═NOR⁴²)CO₂R⁴¹ or CH(CH₃)C(═NOR⁴²)CO₂R⁴¹;

R¹⁰ represents hydrogen, C₁-C₁₀ alkyl, C₁-C₁₀ haloalkyl, C₃-C₈ alkenyl,C₃-C₈ haloalkenyl, C₃-C₈ alkynyl, C₃-C₈ haloalkynyl, C₃-C₁₀ cycloalkyl,C₃-C₁₀ cyclohaloalkyl, C₃-C₁₀ cycloalkenyl, C₃-C₁₀ cyclohaloalkenyl,C₃-C₁₀ cycloalkyl C₁-C₃ alkyl, C₃-C₁₀ cyclohaloalkyl C₁-C₃ alkyl, C₃-C₁₀cycloalkenyl C₁-C₃ alkyl, C₃-C₁₀ cyclohaloalkenyl C₁-C₃ alkyl, C₁-C₅alkylcarbonyl, C₁-C₅ haloalkylcarbonyl, C₃-C₆ cycloalkylcarbonyl, C₃-C₆cyclohaloalkylcarbonyl, C₁-C₆ alkylcarbonyl C₁-C₆ alkyl, C₁-C₆haloalkylcarbonyl C₁-C₆ alkyl, C₁-C₆ alkoxycarbonyl, C₁-C₆haloalkoxycarbonyl, C₃-C₁₀ cycloalkoxycarbonyl, C₃-C₁₀cyclohaloalkoxycarbonyl, C₁-C₁₀ alkoxycarbonyl C₁-C₅ alkyl, C₁-C₁₀haloalkoxycarbonyl C₁-C₅ alkyl, C₃-C₁₀ cycloalkoxycarbonyl C₁-C₅ alkyl,C₃-C₁₀ cyclohaloalkoxycarbonyl C₁-C₅ alkyl, C₁-C₆ alkoxy C₁-C₆ alkyl,C₁-C₆ haloalkoxy C₁-C₆ alkyl, C₁-C₆ alkylthio C₁-C₆ alkyl, C₁-C₆haloalkylthio C₁-C₆ alkyl, cyano C₁-C₄ alkyl, aryl that may have asubstituent or substituents, aryl C₁-C₃ alkyl that may have asubstituent or substituents, arylcarbonyl that may have a substituent orsubstituents, SR¹⁸, SOR¹⁹, SO₂R²⁰, CH₂C(═O)CO₂R⁴¹, CH(CH₃)C(═O)CO₂R⁴¹,CH₂C(═NOR⁴²)CO₂R⁴¹ or CH(CH₃)C(═NOR⁴²)CO₂R⁴¹;

R¹¹ represents hydrogen, C₁-C₁₀ alkyl, C₁-C₁₀ haloalkyl, C₃-C₁₀ alkenyl,C₃-C₁₀ haloalkenyl,C₃-C₁₀ alkynyl, C₃-C₁₀ haloalkynyl, C₃-C₈ cycloalkyl,C₃-C₈ cycloharoalkyl, N(R²¹)(R²²), N═C(R²¹)(R²²), C₁-C₅ alkoxycarbonylC₁-C₃ alkyl or C₁-C₅ haloalkoxycarbonyl C₁-C₃ alkyl;

R¹² represents hydrogen, chlorine, C₁-C₅ alkyl, C₁-C₅ haloalkyl, C₃-C₆cycloalkyl, C₃-C₆ cyclohaloalkyl, or N(R²³)(R²⁴);

R¹³ represents chlorine, C₁-C₁₀ alkyl, C₁-C₁₀ haloalkyl, N(R²⁵)(R²⁶) orOR²⁷;

R¹⁴ represents hydrogen, halogen or C₁-C₃ alkyl;

R¹⁵ represents hydrogen, COOR²⁸, cyano or C₁-C₅ alkyl;

R¹⁶ represents hydrogen, C₁-C₄ alkyl, C₁-C₄ haloalkyl, C₃-C₅ cycloalkylor C₃-C₅ cyclohaloalkyl;

R¹⁷ represents hydrogen, C₁-C₁₀ alkyl, C₁-C₁₀ haloalkyl, C₃-C₆cycloalkyl, C₃-C₆ cyclohaloalkyl, C₃-C₁₀ cycloalkyl C₁-C₃ alkyl, C₃-C₁₀cyclohaloalkyl C₁-C₃ alkyl, C₃-C₅ alkenyl, C₃-C₅ haloalkenyl, C₃-C₅alkynyl, C₃-C₅ haloalkynyl, C₁-C₅ alkoxycarbonyl C₁-C₃ alkyl, C₁-C₅haloalkoxycarbonyl C₁-C₃ alkyl, aryl that may have a substituent orsubstituents or aryl C₁-C₃ alkyl that may have a substituent orsubstituents;

R¹⁸ represents C₁-C₁₀ alkyl, C₁-C₁₀ haloalkyl or aryl that may have asubstituent or substituents;

R¹⁹ represents C₁-C₁₀ alkyl, C₁-C₁₀ haloalkyl, C₃-C₈ cycloalkyl, C₃-C₈cyclohaloalkyl or aryl that may have a substituent or substituents;

R²⁰ represents C₁-C₁₀ alkyl, C₁-C₁₀ haloalkyl, C₃-C₈ cycloalkyl, C₃-C₈cyclohaloalkyl or aryl that may have a substituent or substituents;

R²¹ represents hydrogen or C₁-C₅ alkyl;

R²² represents hydrogen, C₁-C₅ alkyl, C₁-C₅ haloalkyl or aryl that mayhave a substituent or substituents;

R²³ represents hydrogen, C₁-C₁₀ alkyl, C₁-C₁₀ haloalkyl, C₃-C₁₀cycloalkyl, C₃-C₁₀ cyclohaloalkyl or aryl that may have a substituent orsubstituents;

R²⁴ represents hydrogen, C₁-C₁₀ alkyl or C₁-C₁₀ haloalkyl;

R²⁵ represents hydrogen, C₁-C₅ alkyl or C₁-C₅ haloalkyl;

R²⁶ represents hydrogen, C₁-C₁₀ alkyl or C₁-C₁₀ haloalkyl;

R²⁷ represents hydrogen, C₁-C₁₀ alkyl; and

R²⁸ represents hydrogen, C₁-C₁₀ alkyl, C₁-C₁₀ haloalkyl, C₃-C₁₀cycloalkyl, C₃-C₁₀ cyclohaloalkyl or aryl that may have a substituent orsubstituents,

R⁴¹ represents hydrogen, C₁-C₆ alkyl, C₁-C₆ haloalkyl, C₃-C₈ alkenyl andC₃-C₈ alkynyl,

R⁴² represents hydrogen, C₁-C₆ alkyl, C₁-C₆ haloalkyl, C₃-C₈ alkenyl andC₃-C₈ alkynyl, and

R¹²¹ represents hydrogen, chlorine, C₁-C₅ alkyl, C₁-C₅ haloalkyl, C₃-C₆cycloalkyl or C₃-C₆ cyclohaloalkyl,

and herbicides that comprise the said pyridazinone derivatives as theactive ingredient.

Also, the present invention provides pyridazinone derivativesencompassed by the formula: Chemical Formula 4

wherein, R¹⁰⁰ represents hydrogen, halogen or C₁-C₃ alkyl, R¹⁰¹represents C₁-C₃ haloalkyl, and R¹⁰² represents hydrogen or C₁-C₃ alkyl,that is a productional intermediate for the production of the presentinvention compounds.

Furthermore, the present invention provides compounds encompassed by theformula:

R¹⁰³C(═O)NHN═C(R¹⁰⁴)C(CF₃)═C(R¹⁰⁵)CO₂R¹⁰⁶

wherein R¹⁰³ represents C₁-C₆ alkyl, C₁-C₆ alkoxy or amino,R¹⁰⁴represents hydrogen or C₁-C₃ alkyl, R¹⁰⁵ represents hydrogen orC₁-C₃ alkyl, and R¹⁰⁶ represents C₁-C₆ alkyl or phenyl., that is a rawmaterial of the pyridazinone derivative given in Chemical Formula 4.

DETAILED DESCRIPTION OF THE INVENTION

In the present invention,

in the definition of R¹,

halogen means fluorine, chlorine, bromine or iodine,

C₁-C₃ alkyl includes methyl, ethyl, isopropyl, etc.; and

C₁-C₃ haloalkyl includes bromomethyl, chloromethyl, dichloromethyl,trichloromethyl, trifluoromethyl, pentafluoroethyl, 1,1-difluoroethyl,3,3,3-trifluoropropyl, etc.;

in the definition of R²,

halogen means fluorine, chlorine, bromine or iodine atom;

C₁-C₆ alkyl includes methyl, ethyl, isopropyl, normal (hereinafter, n-)pentyl, etc.; and

C₁-C₆ haloalkyl includes trichloromethyl, trifluoromethyl,chlorodifluoromethyl, pentafluoroethyl, etc.;

in the definition of R³,

halogen means fluorine, chlorine, bromine or iodine;

C₁-C₆ alkyl includes methyl, ethyl, isopropyl, n-butyl, etc.;

C₁-C₆ haloalkyl includes chloromethyl, dichloromethyl, trichloromethyl,trifluoromethyl, chlorodifluoromethyl, pentafluoroethyl,1,1-difluoroethyl, 1,1-difluorohexyl, etc.; and

C₁-C₃ alkoxy C₁-C₃ alkyl includes methoxymethyl, ethoxymethyl,isopropoxymethyl, methoxyethyl, etc.;

in the definition of R⁴,

halogen means fluorine, chlorine, bromine or iodine;

C₁-C₆ alkyl includes methyl, ethyl, isopropyl, n-butyl, etc.;

C₁-C₆ haloalkyl includes chloromethyl, dichloromethyl, trichloromethyl,trifluoromethyl, chlorodifluoromethyl, pentafluoroethyl,1,1-difluoroethyl, 3,3,3-trifluoropropyl, etc.; and

C₁-C₃ alkoxy C₁-C₃ alkyl includes methoxymethyl, ethoxymethyl,isopropoxymethyl, methoxyethyl, etc.;

in the definition of R⁵,

halogen atom means fluorine, chlorine, bromine or iodine; and

C₁-C₃ alkyl includes methyl, ethyl, propyl or isopropyl;

in the definition of R⁶,

C₁-C₃ alkyl includes methyl, ethyl, propyl or isopropyl; and

C₁-C₃ haloalkyl includes trichloromethyl, trifluoromethyl,chlorodifluoromethyl, difluoromethyl, pentafluoroethyl,1,1-difluoroethyl, etc.;

in the definition of R⁷,

halogen atom means fluorine, chlorine, bromine or iodine atom; and

C₁-C₃ alkyl includes methyl, ethyl, propyl or isopropyl;

in the definition of R⁸,

C₁-C₁₀ alkyl includes methyl, ethyl, isopropyl, n-butyl, 2-butyl,isoamyl, n-octyl, etc.;

C₁-C₁₀ haloalkyl includes trichloromethyl, trifluoromethyl,chlorodifluoromethyl, pentafluoroethyl, 2-fluoroethyl,2,2,2-triflouroethyl, 5-chloro-n-amyl etc.;

C₃-C₈ alkenyl includes allyl, 1-methyl-2-propenyl, 3-butenyl, 2-butenyl,3-methyl-2-butenyl, 2-methyl-3-butenyl, etc.;

C₃-C₈ haloalkenyl includes 2-chloro-2-propenyl, 3,3-dichloro-2-propenyl,etc.;

C₃-C₈ alkynyl includes propargyl, 1-methyl-2-propynyl, 2-butynyl,3-butynyl, 1,1-dimethyl-2-propynyl, etc.;

C₃-C₈ haloalkynyl includes a 3-iodo-2-propynyl, 3-bromo-2-propynyl,etc.;

C₃-C₁₀ cycloalkyl includes cyclopropyl, cyclopentyl, cyclohexyl, etc.;

C₃-C₁₀ cyclohaloalkyl includes 2-fluorocyclopentyl,3,4-dichlorocyclohexyl, etc.,

C₃-C₁₀ cycloalkenyl includes 2-cyclohexenyl, etc.;

C₃-C₁₀ cyclohaloalkenyl includes 4-chloro-2-cyclohexenyl, etc.;

C₃-C₁₀ cycloalkyl C₁-C₃ alkyl includes cyclopropylmethyl,cyclopentylmethyl, cyclohexylethyl, etc.;

C₃-C₁₀ cyclohaloalkyl C₁-C₃ alkyl includes 2-fluorocyclopentylmethyl,3,4-dichlorocyclohexylethyl, etc.;

C₃-C₁₀ cycloalkenyl C₁-C₃ alkyl includes 2-cyclohexenylmethyl, etc.;

C₃-C₁₀ cyclohaloalkenyl C₁-C₃ alkyl includes4-chloro-2-cyclohexenylmethyl, etc.;

C₁-C₅ alkylcarbonyl includes methylcarbonyl, ethylcarbonyl,propylcarbonyl, etc.;

C₁-C₅ haloalkylcarbonyl includes chloromethylcarbonyl,fluoromethylcarbonyl, trifluoromethylcarbonyl, dichloromethylcarbonyl,2-chloroethylcarbonyl, etc.;

C₃-C₆ cycloalkylcarbonyl includes cyclopropylcarbonyl, etc.;

C₃-C₆ cyclohaloalkylcarbonyl includes 2-fluorocyclopentylcarbonyl,2,2-difluorocyclopentylcarbonyl, 3,4-dichlorocyclohexylcarbonyl, etc.;

C₁-C₆ alkylcarbonyl C₁-C₆ alkyl includes methylcarbonylmethyl,ethylcarbonylmethyl, etc.;

C₁-C₆ haloalkylcarbonyl C₁-C₆ alkyl includes fluoromethylcarbonylmethyl,2-chloroethylcarbonylmethyl, 2-fluoroethylcarbonylmethyl,3,3,3-trifluoromethylcarbonylmethyl, etc.;

C₁-C₆ alkoxycarbonyl includes methoxycarbonyl, ethoxycabonyl,propoxycarbonyl, t-butoxycarbonyl, butoxycarbonyl, amyloxycarbonyl,isopropoxycarbonyl, isobutoxycarbonyl, isoamyloxycarbonyl, etc.;

C₁-C₆ haloalkoxycarbonyl includes chloromethyloxycarbonyl,2-fluoroethyloxycarbonyl, 2-chloropropyloxycarbonyl,3-chlorobutyloxycarbonyl, 2,2-dichloroethyloxycarbonyl,2,2,2-trifluoroethyloxycarbonyl, 2,2,2-trichloroethyloxycarbonyl, etc.;

C₃-C₁₀ cycloalkoxycarbonyl includes cyclopropyloxycarbonyl,cyclobutyloxycarbonyl, cyclopentyloxycarbonyl, cyclohexyloxycarbonyl,etc.;

C₃-C₁₀ cyclohaloalkoxycarbonyl includes 2-fluorocyclopentyloxycarbonyl,3,4-dichlorocyclohexyloxycarbonyl, etc.;

C₁-C₁₀ alkoxycarbonyl C₁-C₅ alkyl includes methoxycarbonylmethyl,ethoxycarbonylmethyl, propoxycarbonylmethyl, isopropyloxycarbonylmethyl,butoxycarbonylmethyl, isobutoxycarbonylmethyl, t-butoxycarbonylmethyl,amyloxycarbonylmethyl, isoamyloxycarbonylmethyl,t-amyloxycarbonylmethyl, 1-methoxycarbonylethyl, 1-ethoxycarbonylethyl,1-propoxycarbonylethyl, 1-isopropoxycarbonylethyl,1-butoxycarbonylethyl, 1-isobutoxycarbonylethyl,1-t-butoxycarbonylethyl, 1-amyloxycarbonylethyl,1-isoamyloxycarbonylethyl, etc.;

C₁-C₁₀ haloalkoxycarbonyl C₁-C₅ alkyl includeschloromethyloxycarbonylmethyl, 2-fluoroethyloxycarbonylmethyl,2-chloropropyloxycarbonylmethyl, 3-chlorobutyloxycarbonylmethyl,2,2-dichloroethyloxycarbonylmethyl,2,2,2-trifluoroethyloxycarbonylmethyl,2,2,2-trichloroethyloxycarbonylethyl, etc.;

C₃-C₁₀ cycloalkoxycarbonyl C₁-C₅ alkyl includescyclopropyloxycarbonylmethyl, cyclobutyloxycarbonylmethyl,cyclopentyloxycarbonylmethyl, cyclohexyloxycarbonylmethyl,1-cyclobutyloxycarbonylethyl, 1-cyclopentyloxycarbonylethyl,1-cyclohexyloxycarbonylethyl, etc.;

C₃-C₁₀ cyclohaloalkoxycarbonyl C₁-C₅ alkyl includes2-fluorocyclopentyloxycarbonylmethyl,3,4-dichlorocyclohexyloxycarbonylethyl, etc.;

C₁-C₆ alkoxy C₁-C₆ alkyl includes methoxymethyl, 1-methoxyethyl,ethoxymethyl, etc.;

C₁-C₆ haloalkoxy C₁-C₆ alkyl includes 2,2,2-trifluoroethoxymethyl, etc.;

C₁-C₆ alkylthio C₁-C₆ alkyl includes methylthiomethyl,1-methylthioethyl, ethylthiomethyl, etc.;

C₁-C₆ haloalkylthio C₁-C₆ alkyl includes 2,2,2-trifluoroethylthiomethyl,etc.; cyano C₁-C₄ alkyl includes cyanomethyl, etc.; aryl that may have asubstituent or substituents means a phenyl, 2-chlorophenyl,2-nitrophenyl, 2-trifluoromethylphenyl, 2-methoxyphenyl, 4-chlorophenyl,4-nitrophenyl, 4-isopropoxyphenyl, 4-fluorophenyl,4-trifluoromethylphenyl, 3-nitrophenyl, 3-methoxyphenyl, 3-methylphenyl,3-trifluoromethylphenyl, 3-bromophenyl, 3-methoxycarbonylphenyl,3-trifluoromethoxyphenyl, 3,4-dichlorophenyl, 2,4-dichlorophenyl,2,5-dichlorophenyl, etc.;

aryl C₁-C₃ alkyl that may have a substituent or substituents meansbenzyl, phenethyl, 1-methylbenzyl, 2-chlorobenzyl, 3-chlorobenzyl,4-chlorobenzyl, 2-methoxybenzyl, 3-methoxybenzyl, 4-methoxybenzyl, etc.;and

arylcarbonyl that may have a substituent or substituents means benzoyl,2-chlorobenzoyl, 3-chlorobenzoyl, 4-chlorobenzoyl, 2,3-dichlorobenzoyl,2,4-dichlorobenzoyl, 2,5-dichlorobenzoyl, 2,6-dichlorobenzoyl,3,4-dichlorobenzoyl, etc.;

in the definition of R⁹,

C₁-C₁₀ alkyl includes methyl, ethyl, isopropyl, n-butyl, 2-butyl,isoamyl, n-octyl, etc.;

C₁-C₁₀ haloalkyl includes trichloromethyl, trifluoromethyl,chlorodifluoromethyl, pentafluoroethyl, 2-fluoroethyl,2,2,2-trifluoroethyl, 5-chloro-n-amyl, etc.;

C₃-C₈ alkenyl includes allyl, 1-methyl-2-propenyl, 3-butenyl, 2-butenyl,3-methyl-2-butenyl, 2-methyl-3-butenyl, etc.;

C₃-C₈ haloalkenyl includes 2-chloro-2-propenyl, 3,3-dichloro-2-propenyl,etc.;

C₃-C₈ alkynyl includes propargyl, 1-methyl-2-propynyl, 2-butynyl,3-butynyl, 1,1-dimethyl-2-propynyl, etc.;

C₃-C₈ haloalkynyl includes 3-iodo-2-propynyl, 3-bromo-2-propynyl, etc.;

C₃-C₁₀ cycloalkyl includes cyclopropyl, cyclopentyl, cyclohexyl,4,4-dimethylcyclohexyl, etc.;

C₃-C₁₀ cyclohaloalkyl includes 2-fluorocyclopentyl,3,4-dichlorocyclohexyl, etc.;

C₃-C₁₀ cycloalkenyl includes 2-cyclohexenyl, etc.;

C₃-C₁₀ cyclohaloalkenyl includes 4-chloro-2-cyclohexenyl, etc.;

C₃-C₁₀ cycloalkyl C₁-C₃ alkyl includes cyclopropylmethyl,cyclopentylmethyl, cyclohexylethyl, etc.;

C₃-C₁₀ cyclohaloalkyl C₁-C₃ alkyl includes 2-fluorocyclopentylmethyl,3,4-dichlorocyclohexylethyl, etc.;

C₃-C₁₀ cycloalkenyl C₁-C₃ alkyl includes 2-cyclohexenylmethyl, etc.;

C₃-C₁₀ cyclohaloalkenyl C₁-C₃ alkyl includes4-chloro-2-cyclohexenylmethyl, etc.;

C₁-C₅ alkylcarbonyl includes methylcarbonyl, ethylcarbonyl,propylcarbonyl, etc.;

C₁-C₅ haloalkylcarbonyl includes chloromethylcarbonyl,fluoromethylcarbonyl, trifluoromethylcarbonyl, dichloromethylcarbonyl,2-chloroethylcarbonyl, etc.;

C₃-C₆ cycloalkylcarbonyl includes cyclopropylcarbonyl, etc.;

C₃-C₆ cyclohaloalkylcarbonyl includes 2-fluorocyclopentylcarbonyl,2,2-difluorocyclopentylcarbonyl, 3,4-dichlorocyclohexylcarbonyl, etc.;

C₁-C₆ alkylcarbonyl C₁-C₆ alkyl includes methylcarbonylmethyl,ethylcarbonylmethyl, etc.;

C₁-C₆ haloalkylcarbonyl C₁-C₆ alkyl includes fluoromethylcarbonylmethyl,2-chloroethylcarbonylmethyl, 2-fluoroethylcarbonylmethyl,3,3,3-trifluoromethylcarbonylmethyl, etc.;

C₁-C₆ alkoxycarbonyl includes methoxycarbonyl, ethoxycabonyl,propoxycarbonyl, t-butoxycarbonyl, butoxycarbonyl, amyloxycarbonyl,isopropoxycarbonyl, isobutoxycarbonyl, isoamyloxycarbonyl, etc.;

C₁-C₆ haloalkoxycarbonyl includes chloromethyloxycarbonyl,2-fluoroethyloxycarbonyl, 2-chloropropyloxycarbonyl,3-chlorobutyloxycarbonyl, 2,2-dichloroethyloxycarbonyl,2,2,2-trifluoroethyloxycarbonyl, 2,2,2-trichloroethyloxycarbonyl, etc.;

C₃-C₁₀ cycloalkoxycarbonyl includes cyclopropyloxycarbonyl,cyclobutyloxycarbonyl, cyclopentyloxycarbonyl, cyclohexyloxycarbonyl,etc.;

C₃-C₁₀ cyclohaloalkoxycarbonyl includes 2-fluorocyclopentyloxycarbonyl,3,4-dichlorocyclohexyloxycarbonyl, etc.;

C₁-C₁₀ alkoxycarbonyl C₁-C₅ alkyl includes methoxycarbonylmethyl,ethoxycarbonylmethyl, propoxycarbonylmethyl, isopropoxycarbonylmethyl,butoxycarbonylmethyl, isobutoxycarbonylmethyl, t-butoxycarbonylmethyl,amyloxycarbonylmethyl, isoamyloxycarbonylmethyl,t-amyloxycarbonylmethyl, 1-methoxycarbonylethyl, 1-ethoxycarbonylethyl,1-propoxycarbonylethyl, 1-isopropoxycarbonylethyl,1-butoxycarbonylethyl, 1-isobutoxycarbonylethyl,1-t-butoxycarbonylethyl, 1-amyloxycarbonylethyl,1-isoamyloxycarbonylethyl, etc.;

C₁-C₁₀ haloalkoxycarbonyl C₁-C₅ alkyl includeschloromethyloxycarbonylmethyl, 2-fluoroethyloxycarbonylmethyl,2-chloropropyloxycarbonylmethyl, 3-chlorobutyloxycarbonylmethyl,2,2-dichloroethyloxycarbonylmethyl,2,2,2-trifluoroethyloxycarbonylmethyl,2,2,2-trichloroethyloxycarbonylethyl, etc.;

C₃-C₁₀ cycloalkoxycarbonyl C₁-C₅ alkyl includescyclopropyloxycarbonylmethyl, cyclobutyloxycarbonylmethyl,cyclopentyloxycarbonylmethyl, cyclohexyloxycarbonylmethyl,1-cyclobutyloxycarbonylethyl, 1-cyclopentyloxycarbonylethyl,1-cyclohexyloxycarbonylethyl, etc.;

C₃-C₁₀ cyclohaloalkoxycarbonyl C₁-C₅ alkyl includes2-fluorocyclopentyloxycarbonylmethyl,3,4-dichlorocyclohexyloxycarbonylethyl, etc.;

C₁-C₆ alkoxy C₁-C₆ alkyl includes methoxymethyl, 1-methoxyethyl,ethoxymethyl, etc.;

C₁-C₆ haloalkoxy C₁-C₆ alkyl includes 2,2,2-trifluoroethoxymethyl, etc.;

C₁-C₆ alkylthio C₁-C₆ alkyl includes methylthiomethyl,1-methylthioethyl, ethylthiomethyl, etc.;

C₁-C₆ haloalkylthio C₁-C₆ alkyl includes 2,2,2-trifluoroethylthiomethyl,etc.; cyano C₁-C₄ alkyl includes cyanomethyl, etc.;

aryl that may have a substituent or substituents means phenyl,2-chlorophenyl, 2-nitrophenyl, 2-trifluoromethylphenyl, 2-methoxyphenyl,4-chlorophenyl, 4-nitrophenyl, 4-isopropoxyphenyl, 4-fluorophenyl,4-trifluoromethylphenyl, 3-nitrophenyl, 3-methoxyphenyl, 3-methylphenyl,3-trifluoromethylphenyl, 3-bromophenyl, 3-methoxycarbonylphenyl,3-trifluoromethoxyphenyl, 3,4-dichlorophenyl, 2,4-dichlorophenyl,2,5-dichlorophenyl, etc.;

aryl C₁-C₃ alkyl that may have a substituent or substituents meansbenzyl, phenethyl, 1-methylbenzyl, 2-chlorobenzyl, 3-chlorobenzyl,4-chlorobenzyl, 2-methoxybenzyl, 3-methoxybenzyl, 4-methoxybenzyl, etc.;and

arylcarbonyl that may have a substituent of substituents means benzoyl,2-chlorobenzoyl, 3-chlorobenzoyl, 4-chlorobenzoyl, 2,3-dichlorobenzoyl,2,4-dichlorobenzoyl, 2,5-dichlorobenzoyl, 2,6-dichlorobenzoyl,3,4-dichlorobenzoyl, etc.;

in the definition of R¹⁰,

C₁-C₁₀ alkyl includes methyl, ethyl, isopropyl, n-butyl, 2-butyl,isoamyl, n-octyl, etc.;

C₁-C₁₀ haloalkyl includes trichloromethyl, trifluoromethyl,chlorodifluoromethyl, pentafluoroethyl, 2-fluoroethyl,2,2,2-triflouroethyl, 5-chloro-n-amyl, etc.;

C₃-C₈ alkenyl includes allyl, 1-methyl-2-propenyl, 3-butenyl, 2-butenyl,3-methyl-2-butenyl, 2-methyl-3-butenyl, etc.;

C₃-C₈ haloalkenyl includes 2-chloro-2-propenyl, 3,3-dichloro-2-propenyl,etc.;

C₃-C₈ alkynyl includes propargyl, 1-methyl-2-propynyl, 2-butynyl,3-butynyl, 1,1-dimethyl-2-propynyl, etc.;

C₃-C₈ haloalkynyl includes 3-iodo-2-propynyl, 3-bromo-2-propynyl, etc.;

C₃-C₁₀ cycloalkyl includes cyclopropyl, cyclopentyl, cyclohexyl,4,4-dimethylcyclohexyl, etc.;

C₃-C₁₀ cyclohaloalkyl includes 2-fluorocyclopentyl,3,4-dichlorocyclohexyl, etc.;

C₃-C₁₀ cycloalkenyl includes 2-cyclohexenyl, etc.;

C₃-C₁₀ cyclohaloalkenyl includes 4-chloro-2-cyclohexenyl, etc.;

C₃-C₁₀ cycloalkyl C₁-C₃ alkyl includes cyclopropylmethyl,cyclopentylmethyl, cyclohexylethyl, etc.;

C₃-C₁₀ cyclohaloalkyl C₁-C₃ alkyl includes 2-fluorocyclopentylmethyl,3,4-dichlorocyclohexylethyl, etc.;

C₃-C₁₀ cycloalkenyl C₁-C₃ alkyl includes 2-cyclohexenylmethyl, etc.;

C₃-C₁₀ cyclohaloalkenyl C₁-C₃ alkyl includes4-chloro-2-cyclohexenylmethyl, etc.;

C₁-C₅ alkylcarbonyl includes methylcarbonyl, ethylcarbonyl,propylcarbonyl, etc.;

C₁-C₅ haloalkylcarbonyl includes chloromethylcarbonyl,fluoromethylcarbonyl, trifluoromethylcarbonyl, dichloromethylcarbonyl,2-chloroethylcarbonyl, etc.;

C₃-C₆ cycloalkylcarbonyl includes cyclopropylcarbonyl, etc.;

C₃-C₆ cyclohaloalkylcarbonyl includes 2-fluorocyclopentylcarbonyl,2,2-difluorocyclopentylcarbonyl, 3,4-dichlorocyclohexylcarbonyl, etc.;

C₁-C₆ alkylcarbonyl C₁-C₆ alkyl includes methylcarbonylmethyl,ethylcarbonylmethyl, etc.;

C₁-C₆ haloalkylcarbonyl C₁-C₆ alkyl includes fluoromethylcarbonylmethyl,2-chloroethylcarbonylmethyl, 2-fluoroethylcarbonylmethyl,3,3,3-trifluoromethylcarbonylmethyl, etc.;

C₁-C₆ alkyloxycarbonyl includes methoxycarbonyl, ethoxycabonyl,propoxycarbonyl, t-butoxycarbonyl, butoxycarbonyl, amyloxycarbonyl,isopropoxycarbonyl, isobutoxycarbonyl, isoamyloxycarbonyl, etc.;

C₁-C₆ haloalkoxycarbonyl includes chloromethyloxycarbonyl,2-fluoroethyloxycarbonyl, 2-chloropropyloxycarbonyl,3-chlorobutyloxycarbonyl, 2,2-dichloroethyloxycarbonyl,2,2,2-trifluoroethyloxycarbonyl, 2,2,2-trichloroethyloxycarbonyl, etc.;

C₃-C₁₀ cycloalkoxycarbonyl includes cyclopropyloxycarbonyl,cyclobutyloxycarbonyl, cyclopentyloxycarbonyl, cyclohexyloxycarbonyl,etc.;

C₃-C₁₀ cyclohaloalkoxycarbonyl includes 2-fluorocyclopentyloxycarbonyl,3,4-dichlorocyclohexyloxycarbonyl, etc.;

C₁-C₁₀ alkoxycarbonyl C₁-C₅ alkyl includes methoxycarbonylmethyl,ethoxycarbonylmethyl, propoxycarbonylmethyl, isopropoxycarbonylmethyl,butoxycarbonylmethyl, isobutoxycarbonylmethyl, t-butoxycarbonylmethyl,amyloxycarbonylmethyl, isoamyloxycarbonylmethyl,t-amyloxycarbonylmethyl, 1-methoxycarbonylethyl, 1-ethoxycarbonylethyl,1-propoxycarbonylethyl, 1-isopropoxycarbonylethyl,1-butoxycarbonylethyl, 1-isobutoxycarbonylethyl,1-t-butoxycarbonylethyl, 1-amyloxycarbonylethyl,1-isoamyloxycarbonylethyl, etc.;

C₁-C₁₀ haloalkoxycarbonyl C₁-C₅ alkyl includeschloromethyloxycarbonylmethyl, 2-fluoroethyloxycarbonylmethyl,2-chloropropyloxycarbonylmethyl, 3-chlorobutyloxycarbonylmethyl,2,2-dichloroethyloxycarbonylmethyl,2,2,2-trifluoroethyloxycarbonylmethyl,2,2,2-trichloroethyloxycarbonylethyl, etc.;

C₃-C₁₀ cycloalkoxycarbonyl C₁-C₅ alkyl includescyclopropyloxycarbonylmethyl, cyclobutyloxycarbonylmethyl,cyclopentyloxycarbonylmethyl, cyclohexyloxycarbonylmethyl,1-cyclobutyloxycarbonylethyl, 1-cyclopentyloxycarbonylethyl,1-cyclohexyloxycarbonylethyl, etc.;

C₃-C₁₀ cyclohaloalkoxycarbonyl C₁-C₅ alkyl includes2-fluorocyclopentyloxycarbonylmethyl,3,4-dichlorocyclohexyloxycarbonylethyl, etc.;

C₁-C₆ alkoxy C₁-C₆ alkyl includes a methoxymethyl, 1-methoxyethyl,ethoxymethyl, C₁-C₆ haloalkoxy C₁-C₆ alkyl includes2,2,2-trifluoroethoxymethyl, etc.;

C₁-C₆ alkylthio C₁-C₆ alkyl includes methylthiomethyl,1-methylthioethyl, ethylthiomethyl, etc.;

C₁-C₆ haloalkylthio C₁-C₆ alkyl includes 2,2,2-trifluoroethylthiomethyl,etc.; cyano C₁-C₄ alkyl includes cyanomethyl, etc.;

aryl that may have a substituent or substituents means phenyl,2-chlorophenyl, 2-nitrophenyl, 2-trifluoromethylphenyl, 2-methoxyphenyl,4-chlorophenyl, 4-nitrophenyl, 4-isopropoxyphenyl, 4-fluorophenyl,4-trifluoromethylphenyl, 3-nitrophenyl, 3-methoxyphenyl, 3-methylphenyl,3-trifluoromethylphenyl, 3-bromophenyl, 3-methoxycarbonylphenyl,3-trifluoromethoxyphenyl, 3,4-dichlorophenyl, 2,4-dichlorophenyl,2,5-dichlorophenyl, etc.;

aryl C₁-C₃ alkyl that may have a substituent or substituents meansbenzyl, phenethyl, 1-methylbenzyl, 2-chlorobenzyl, 3-chlorobenzyl,4-chlorobenzyl, 2-methoxybenzyl, 3-methoxybenzyl, 4-methoxybenzyl, etc.;and

arylcarbonyl that may have a substituent or substituents means benzoyl,2-chlorobenzoyl, 3-chlorobenzoyl, 4-chlorobenzoyl, 2,3-dichlorobenzoyl,2,4-dichlorobenzoyl, 2,5-dichlorobenzoyl, 2,6-dichlorobenzoyl,3,4-dichlorobenzoyl, etc.;

in the definition of R¹¹,

C₁-C₁₀ alkyl includes methyl, ethyl, isopropyl, n-butyl, t-butyl,isopentyl, n-hexyl, n-octyl, etc.;

C₁-C₁₀ haloalkyl includes 2-fluoroethyl, 2,2,2-triflouroethyl,5-chloro-n-pentyl, 1-bromoheptyl, etc.;

C₃-C₁₀ alkenyl includes allyl, 1-methyl-2-propenyl, 3-butenyl,2-butenyl, 3-methyl-2-butenyl, 2-methyl-3-butenyl, etc.;

C₃-C₁₀ haloalkenyl includes 2-chloro-2-propenyl,3,3-dichloro-2-propenyl, etc.;

C₃-C₁₀ alkynyl includes propargyl, 1-methyl-2-propynyl, 2-butynyl,3-butynyl, 1,1-dimethyl-2-propynyl, etc.;

C₃-C₁₀ haloalkynyl includes 3-iodo-2-propynyl, 3-bromo-2-propynyl, etc.;

C₃-C₈ cycloalkyl includes cyclopropyl, cyclobutyl, cyclopentyl,cyclohexyl, etc.;

C₃-C₈ cyclohaloalkyl includes 2-fluorocyclopentyl,3,4-dichlorocyclohexyl, etc.;

C₁-C₅ alkoxycarbonyl C₁-C₃ alkyl includes methoxycarbonylmethyl,ethoxycarbonylmethyl, propoxycarbonylmethyl, isopropylcarbonylmethyl,butoxycarbonylmethyl, isobutoxycarbonylmethyl, t-butoxycarbonylmethyl,1-methoxycarbonylethyl, 1-ethoxycarbonylethyl, 1-propoxycarbonylethyl,1-isopropoxycarbonylethyl, 1-butoxycarbonylethyl,1-isobutoxycarbonylethyl, 1-t-butoxycarbonylethyl, etc.;

C₁-C₅ haloalkoxycarbonyl C₁-C₃ alkyl includeschloromethyloxycarbonylmethyl, 2-fluoroethyloxycarbonylmethyl,2-chloropropyloxycarbonylmethyl, 3-chlorobutyloxycarbonylmethyl,1-chloro-2-propyloxycarbonylmethyl,1,3-dichloro-2-propyloxycarbonylmethyl,2,2-dichloroethyloxycarbonylmethyl,2,2,2-trifluoroethyloxycarbonylmethyl,2,2,2-trichloroethyloxycarbonylmethyl, etc.;

in the definition of R¹²,

C₁-C₅ alkyl includes methyl, ethyl, n-propyl, isopropyl, n-butyl,isobutyl, t-butyl, etc.;

C₁-C₅ haloalkyl includes fluoromethyl, chloromethyl, bromomethyl,trifluoromethyl, chlorodifluormethyl, difluoromethyl or pentafluoroethyl

C₃-C₆ cycloalkyl includes cyclopropyl, cyclopentyl, 1-methylcyclopropyl,etc.; and

C₃-C₆ cyclohaloalkyl includes 2,2-difluorocyclopropyl,3-chlorocyclopentyl, etc.;

in the definition of R¹³,

C₁-C₁₀ alkyl includes methyl, ethyl, n-propyl, isopropyl, n-butyl,t-butyl, n-pentyl, n-hexyl, etc.; and

C₁-C₁₀ haloalkyl includes chloromethyl, trifluoromethyl, chloroethyl,2,2,2-trifluoroethyl, 3-chlorohexyl, etc.;

in the definition of R¹⁴,

halogen means fluorine, chlorine or bromine; and

C₁-C₃ alkyl includes methyl, ethyl, propyl or isopropyl;

in the definition of R¹⁵,

C₁-C₅ alkyl includes methyl, ethyl, propyl, isopropyl, n-butyl, etc.;

in the definition of R¹⁶,

C₁-C₄ alkyl includes methyl, ethyl, isopropyl, n-butyl, etc.;

C₁-C₄ haloalkyl be a chloromethyl, 2-chloroethyl, trifluoromethyl,pentafluoroethyl, chlorodifluormethyl, etc.;

C₃-C₅ cycloalkyl includes cyclopropyl, cyclopentyl, etc.; and

C₃-C₅ cyclohaloalkyl includes 2,2-difluorocyclopropyl,3-chlorocyclopentyl, etc.;

in the definition of R¹⁷,

C₁-C₁₀ alkyl includes methyl, ethyl, n-propyl, isopropyl, n-butyl,t-butyl, n-pentyl, n-hexyl, etc.;

C₁-C₁₀ haloalkyl includes 2-chloroethyl, 2,2,2-triflouroethyl,trichloromethyl, trifluoromethyl, chlorodifluoromethyl,pentafluoroethyl, 2-fluoroethyl, 5-chloro-n-amyl, etc.;

C₃-C₆ cycloalkyl includes cyclopropyl, cyclobutyl, cyclopentyl,cyclohexyl, 1-methylcyclopropyl, etc.;

C₃-C₆ cyclohaloalkyl includes 2,2-difluorocyclopropyl,3-chlorocyclopentyl, etc.;

C₃-C₁₀ cycloalkyl C₁-C₃ alkyl includes cyclopropylmethyl,cyclopentylmethyl, cyclohexylethyl, etc.;

C₃-C₁₀ cyclohaloalkyl C₁-C₃ alkyl includes 2-fluorocyclopentylmethyl,3,4-dichlorocyclohexylethyl, etc.;

C₃-C₅ alkenyl includes allyl, 1-methyl-2-propenyl, 3-butenyl, 2-butenyl,3-methyl-2-butenyl, 2-methyl-3-butenyl, etc.;

C₃-C₅ haloalkenyl includes 2-chloro-2-propenyl, 3,3-dichloro-2-propenyl,etc.;

C₃-C₅ alkynyl includes propargyl, 1-methyl-2-propynyl, 2-butynyl,3-butynyl, 1,1-dimethyl-2-propynyl, etc.;

C₃-C₅ haloalkynyl includes 3-iodo-2-propynyl, 3-bromo-2-propynyl, etc.;

C₁-C₅ alkoxycarbonyl C₁-C₃ alkyl includes methoxycarbonylmethyl,ethoxycabonylmethyl, propoxycarbonylmethyl, isopropoxycarbonylmethyl,butoxycarbonylmethyl, isobutoxycarbonylmethyl, t-butoxycarbonylmethyl,1-methoxycarbonylethyl, 1-ethoxycarbonylethyl, 1-propoxycarbonylethyl,1-isopropoxycarbonylethyl, 1-butoxycarbonylethyl,1-isobutoxycarbonylethyl, 1-t-butoxycarbonylethyl, etc.;

C₁-C₅ haloalkoxycarbonyl C₁-C₃ alkyl includeschloromethyloxycarbonylmethyl, 2-fluoroethyloxycarbonylmethyl,2-chloropropyloxycarbonylmethyl, 3-chlorobutyloxycarbonylmethyl,2,2-dichloroethyloxycarbonylmethyl,2,2,2-trifluoroethyloxycarbonylmethyl,2,2,2-trichloroethyloxycarbonylethyl, etc.;

aryl that may have a substituent or substituents means phenyl,2-chlorophenyl, 2-nitrophenyl, 2-trifluoromethylphenyl, 2-methoxyphenyl,4-chlorophenyl, 4-nitrophenyl, 4-isopropoxyphenyl, 4-fluorophenyl,4-trifluoromethylphenyl, 3-nitrophenyl, 3-methoxyphenyl, 3-methylphenyl,3-trifluoromethylphenyl, 3-bromophenyl, 3-methoxycarbonylphenyl,3-trifluoromethoxyphenyl, 3,4-dichlorophenyl, 2,4-dichlorophenyl,2,5-dichlorophenyl, etc.;

aryl C₁-C₃ alkyl that may have a substituent or substituents meansbenzyl, phenethyl, 1-methylbenzyl, 2-chlorobenzyl, 3-chlorobenzyl,4-chlorobenzyl, 2-methoxybenzyl, 3-methoxybenzyl, 4-methoxybenzyl, etc.;

in the definition of R¹⁸,

C₁-C₁₀ alkyl includes methyl, ethyl, isopropyl, n-butyl, isopentyl,n-octyl, etc.;

C₁-C₁₀ haloalkyl includes 2-fluoroethyl, 2,2,2-triflouroethyl,5-chloro-n-pentyl, etc.; and

aryl that may have a substituent or substituents means a phenyl,2-chlorophenyl, 2-nitrophenyl, 2-trifluoromethylphenyl, 2-methoxyphenyl,4-chlorophenyl, 4-nitrophenyl, 4-isopropoxyphenyl, 4-fluorophenyl,4-methylphenyl, 4-trifluoromethylphenyl, 3-nitrophenyl, 3-methoxyphenyl,3-methylphenyl, 3-trifluoromethylphenyl, 3-bromophenyl,3-methoxycarbonylphenyl, 3-trifluoromethoxyphenyl, 3,4-dichlorophenyl,2,4-dichlorophenyl, 2,5-dichlorophenyl, etc.;

in the definition of R¹⁹,

C₁-C₁₀ alkyl includes methyl, ethyl, isopropyl, n-butyl, isopentyl,n-octyl, etc.

C₁-C₁₀ haloalkyl includes 2-fluoroethyl, 2,2,2-triflouroethyl,5-chloro-n-pentyl, etc.;

C₃-C₈ cycloalkyl includes cyclopropyl, cyclopentyl, cyclohexyl, etc.;

C₃-C₈ cyclohaloalkyl includes 2-fluorocyclopentyl,3,4-dichlorocyclohexyl, etc.; and

aryl that may have a substituent or substituents means phenyl,2-chlorophenyl, 2-nitrophenyl, 2-trifluoromethylphenyl, 2-methoxyphenyl,4-chlorophenyl, 4-nitrophenyl, 4-isopropoxyphenyl, 4-fluorophenyl,4-methylphenyl, 4-trifluoromethylphenyl, 3-nitrophenyl, 3-methoxyphenyl,3-methylphenyl, 3-trifluoromethylphenyl, 3-bromophenyl,3-methoxycarbonylphenyl, 3-trifluoromethoxyphenyl, 3,4-dichlorophenyl,2,4-dichlorophenyl, 2,5-dichlorophenyl, etc.;

in the definition of R²⁰,

C₁-C₁₀ alkyl includes methyl, ethyl, isopropyl, n-butyl, isopentyl,n-octyl, etc.;

C₁-C₁₀ haloalkyl includes chloromethyl, trichloromethyl,trifluoromethyl, 2-chloroethyl, 2-fluoroethyl, 3-chloropropyl,2,2,2-trifluoroethyl, 5-chloro-n-pentyl, etc.;

C₃-C₈ cycloalkyl includes cyclopropyl, cyclobutyl, cyclopentyl,cyclohexyl, etc.;

C₃-C₈ cyclohaloalkyl includes 2,2-difluorocyclopropyl,3-chlorocyclopentyl, 4,4-difluorocyclohexyl, etc.; and

aryl that may have a substituent or substituents means phenyl,2-chlorophenyl, 2-nitrophenyl, 2-trifluoromethylphenyl, 2-methoxyphenyl,4-chlorophenyl, 4-nitrophenyl, 4-isopropoxyphenyl, 4-fluorophenyl,4-methylphenyl, 4-trifluoromethylphenyl, 3-nitrophenyl, 3-methoxyphenyl,3-methylphenyl, 3-trifluoromethylphenyl, 3-bromophenyl,3-methoxycarbonylphenyl, 3-trifluoromethoxyphenyl, 3,4-dichlorophenyl,2,4-dichlorophenyl, 2,5-dichlorophenyl, etc.;

in the definition of R²¹,

C₁-C₅ alkyl includes methyl, ethyl, n-propyl, isopropyl, butyl, etc.;

in the definition of R²²,

C₁-C₅ alkyl includes methyl, ethyl, n-propyl, isopropyl, butyl, etc.;

C₁-C₅ haloalkyl includes 2-chloroethyl, 2-fluoroethyl,3-chloro-n-propyl, 2-chloro-2-methylpropyl, etc.; and

aryl that may have a substituent or substituents means phenyl,2-chlorophenyl, 2-nitrophenyl, 2-trifluoromethylphenyl, 2-methoxyphenyl,4-chlorophenyl, 4-nitrophenyl, 4-isopropoxyphenyl, 4-fluorophenyl,4-methylphenyl, 4-trifluoromethylphenyl, 3-nitrophenyl, 3-methoxyphenyl,3-methylphenyl, 3-trifluoromethylphenyl, 3-bromophenyl,3-methoxycarbonylphenyl, 3-trifluoromethoxyphenyl, 3,4-dichlorophenyl,2,4-dichlorophenyl or 2,5-dichlorophenyl, 3,4-dimethylphenyl,2,4-dimethylphenyl, 2,5-dimethylphenyl, etc.;

in the definition of R²³,

C₁-C₁₀ alkyl includes methyl, ethyl, isopropyl, n-butyl, isopentyl,n-octyl, 4,4-dimethyl-n-hexyl, etc.;

C₁-C₁₀ haloalkyl includes 2-fluoroethyl, 2-chloroethyl,3-chloro-n-propyl, 2,2,2-trifluoroethyl, 5-chloro-n-pentyl,1-bromoheptyl, etc.;

C₃-C₁₀ cycloalkyl includes cyclopropyl, cyclobutyl, cyclopentyl,cyclohexyl, etc.;

C₃-C₁₀ cyclohaloalkyl includes 2,2-difluorocyclopropyl,3-chlorocyclopentyl, 4,4-difluorocyclohexyl, etc.; and

aryl that may have a substituent or substituents means phenyl,2-chlorophenyl, 2-nitrophenyl, 2-trifluoromethylphenyl, 2-methoxyphenyl,4-chlorophenyl, 4-nitrophenyl, 4-isopropoxyphenyl, 4-fluorophenyl,4-methylphenyl, 4-trifluoromethylphenyl, 3-nitrophenyl, 3-methoxyphenyl,3-methylphenyl, 3-trifluoromethylphenyl, 3-bromophenyl,3-methoxycarbonylphenyl, 3-trifluoromethoxyphenyl, 3,4-dichlorophenyl,2,4-dichlorophenyl, 2,5-dichlorophenyl, 3,4-dimethylphenyl,2,4-dimethylphenyl, 2,5 dimethylphenyl, etc.;

in the definition of R²⁴,

C₁-C₁₀ alkyl includes methyl, ethyl, isopropyl, n-butyl, t-butyl,n-pentyl, isopentyl, n-octyl, 4,4-dimethyl-n-hexyl, etc.; and

C₁-C₁₀ haloalkyl includes 2-fluoroethyl, 2-chloroethyl,3-chloro-n-propyl, 2,2,2-trifluoroethyl, 5-chloro-n-pentyl,1-bromoheptyl, etc.;

in the definition of R²⁵,

C₁-C₅ alkyl includes methyl, ethyl, isopropyl, n-butyl, t-butyl,n-pentyl, isopentyl, etc.; and

C₁-C₅ haloalkyl includes 2-fluoroethyl, 2-chloroethyl,3-chloro-n-propyl, 2,2,2-trifluoroethyl, 5-chloro-n-pentyl, etc.;

in the definition of R²⁶,

C₁-C₁₀ alkyl includes methyl, ethyl, isopropyl, n-butyl, t-butyl,n-pentyl, isopentyl, n-octyl, 4,4-dimethyl-n-hexyl, etc.; and

C₁-C₁₀ haloalkyl includes 2-fluoroethyl, 2-chloroethyl,3-chloro-n-propyl, 2,2,2-trifluoroethyl, 5-chloro-n-pentyl,2-chloro-1,1,4,4-tetramethylhexyl, etc.;

in the definition of R²⁷,

C₁-C₁₀ alkyl includes methyl, ethyl, propyl, isopropyl, n-butyl,isobutyl, t-butyl, n-pentyl, isopentyl, n-hexyl, n-octyl, etc.;

in the definition of R²⁸,

C₁-C₁₀ alkyl includes methyl, ethyl, propyl, isopropyl, n-butyl,isobutyl, t-butyl, n-pentyl, isopentyl, n-hexyl, n-octyl, etc.;

C₁-C₁₀ haloalkyl includes 2-fluoroethyl, 2-chloroethyl,3-chloro-n-propyl, 2,2,2-trifluoroethyl, 5-chloro-n-pentyl, etc.

C₃-C₁₀ cycloalkyl includes cyclopropyl, cyclopentyl, cyclohexyl, etc.;

C₃-C₁₀ cyclohaloalkyl includes 2,2-difluorocyclopropyl,3-chlorocyclopentyl, 4,4-difluorocyclohexyl, etc.; and

aryl that may have a substituent or substituents means phenyl,2-chlorophenyl, 2-nitrophenyl, 2-trifluoromethylphenyl, 2-methoxyphenyl,4-chlorophenyl, 4-nitrophenyl, 4-isopropoxyphenyl, 4-fluorophenyl,4-methylphenyl, 4-trifluoromethylphenyl, 3-nitrophenyl, 3-methoxyphenyl,3-methylphenyl, 3-trifluoromethylphenyl, 3-bromophenyl,3-methoxycarbonylphenyl, 3-trifluoromethoxyphenyl, 3,4-dichlorophenyl,2,4-dichlorophenyl, 2,5-dichlorophenyl, 3,4-dimethylphenyl,2,4-dimethylphenyl, 2,5 dimethylphenyl, etc.;

in the definition of R⁴¹,

C₁-C₆ alkyl includes methyl, ethyl, propyl, isopropyl, n-butyl, t-butyl,etc.;

C₁-C₆ haloalkyl includes chloromethyl, bromomethyl, trichloromethyl,trifluoromethyl, 2-fluoroethyl, 2-chloroethyl, 2,2,2-trifluoroethyl,etc.;

C₃-C₈ alkenyl includes allyl, 1-methyl-2-propenyl, 3-butenyl, 2-butenyl,3-methyl-2-butenyl, 2-methyl-3-butenyl, etc.; and

C₃-C₈ alkynyl includes propargyl, 1-methyl-2-propynyl, 2-butynyl,3-butynyl, 1,1-dimethyl-2-propynyl, etc.;

in the definition of R⁴²,

C₁-C₆ alkyl includes methyl, ethyl, propyl, isopropyl, n-butyl, t-butyl,etc.;

C₁-C₆ haloalkyl includes chloromethyl, bromomethyl, trichloromethyl,trifluoromethyl, 2-fluoroethyl, 2-chloroethyl, 2,2,2-trifluoroethyl,etc.;

C₃-C₈ alkenyl includes allyl, 1-methyl-2-propenyl, 3-butenyl, 2-butenyl,3-methyl-2-butenyl, 2-methyl-3-butenyl, etc.; and

C₃-C₈ alkynyl includes propargyl, 1-methyl-2-propynyl, 2-butynyl,3-butynyl, 1,1-dimethyl-2-propynyl, etc.;

in the definition of R¹²¹,

C₁-C₅ alkyl includes methyl, ethyl, isopropyl, n-butyl, t-butyl,n-pentyl, isopentyl, etc.;

C₁-C₅ haloalkyl includes 2-fluoroethyl, 2-chloroethyl,3-chloro-n-propyl, 2,2,2-trifluoroethyl, 5-chloro-n-pentyl, etc.;

C₃-C₆ cycloalkyl includes cyclopropyl, cyclobutyl, cyclopentyl,cyclohexyl, etc.; and

C₃-C₆ cyclohaloalkyl includes 2,2-difluorocyclopropyl,3-chlorocyclopentyl, 4,4-difluorocyclohexyl, etc.;

in the definition of R¹⁰⁰,

halogen atom means fluorine, chlorine, bromine or iodine, and

C₁-C₃ alkyl includes methyl, ethyl, propyl, isopropyl;

in the definition of R¹⁰¹,

C₁-C₃ haloalkyl includes trichloromethyl, trifluoromethyl,difluoromethyl, chlorodifluoromethyl, pentafluoroethyl,1,1-difluoroethyl, etc.;

in the definition of R¹⁰²,

C₁-C₃ alkyl includes methyl, ethyl, propyl, isopropyl;

in the definition of R¹⁰³,

C₁-C₆ alkyl includes methyl, ethyl, t-butyl, etc.; and

C₁-C₆ alkoxy includes methoxy, ethoxy, t-butoxy, etc.;

in the definition of R¹⁰⁴,

C₁-C₃ alkyl includes methyl, ethyl, propyl or isopropyl;

in the definition of R¹⁰⁵,

C₁-C₃ alkyl includes methyl, ethyl, propyl or isopropyl; and

in the definition of R¹⁰⁶,

C₁-C₆ alkyl includes methyl, ethyl, etc..

Among the present invention compounds, preferred are

2-(2,3,5-trichlorobenzyl)-5-(trifluoromethyl)-2,3-dihydropyridazin-3-one,

2-(2,3,5-trichlorobenzyl)-4-methyl-5-(trifluoromethyl)-2,3-dihydropyridazin-3-one,

2-(2,3,5-trichlorobenzyl)-5-(chlorodifluoromethyl)-2,3-dihydropyridazin-3-one,

2-(2,3,5-trichlorobenzyl)-4-methyl-5-(chlorodifluoromethyl)-2,3-dihydropyridazin-3-one,

2-(2,3,5-trichlorobenzyl)5-(1,1-difluoroethyl)-2,3-dihydropyridazin-3-one,and

2-(2,3,5-trichlorobenzyl)-4-methyl-5-(1,1-difluoroethyl)-2,3-dihydropyridazin-3-one.

Moreover, for the present compound invention, there are situations whendouble bonds educe geometric isomers or when asymmetric carbons educeoptical isomers and diastereoisomers. As such, the present inventioncompounds may also contain isomers thereof and mixture of such isomers.

The present invention compound, for example, may be produced byutilizing the following production method 1 and production method 2.

(production method 1)

A method which comprises reacting the pyridazinone derivative having thefollowing formula:

wherein, R⁵, R⁶ and R⁷ have the same definition as mentioned above, withthe benzyl derivative having the following formula:

wherein, R¹, R², R³ and R⁴ have the same definition as mentioned above,and X represents chlorine, bromine, methanesulfonyloxy orp-toluenesulfonyloxy, in the presence of a base.

The said reaction is usually performed without any solvent or in asolvent. The limits to the reaction temperature are from 0 to 200° C.,and the limits to the reaction time are usually from a moment to 24hours.

For the amount of the agents used in the reaction, based on 1 mole ofthe pyridazinone derivative of Chemical Formula 5, a ratio of 1 mole ofthe benzyl derivative of Chemical Formula 6 and a rate of 1 mole of thebase are the theoretical amounts, but may be optionally altered tocorrespond to the condition of the reaction.

As the base, organic bases such as pyridine, 4-dimethylaminopyridine,N,N-dimethylaniline, N,N-diethylaniline, triethylamine anddiisopropylethylamine, and inorganic bases such as sodium carbonate,potassium carbonate, sodium hydride, potassium hydride, sodium hydroxideand potassium hydroxide may be set forth.

As the solvent, aliphatic hydrocarbons such as hexane, heptane, octaneand ligroin; aromatic hydrocarbons such as benzene, toluene,ethylbenzene, xylene and mesitylene; ethers such as 1,4-dioxane,tetrahydrofuran, ethylene glycol dimethyl ether and methyl-t-butylether; nitro compounds such as nitrobenzene; acid amides such asN,N-dimethylformamide; sulfur compounds such as dimethylsulfoxide(hereinafter, written as DMSO) and sulfolane; or a mixture thereof maybe set forth.

After the completion of the reaction, the reaction mixture is subjectedto the ordinary post-treatment such as pouring into water, extractingwith an organic solvent, drying the organic layer and concentrating it.If necessary, purification such as recrystallization or columnchromatography may be carried out. Thus the present invention compoundcan be obtained.

(production method 2)

A production method that complies to the following scheme:

wherein, R⁵⁰ represents hydrogen or C₁-C₃ alkyl and R¹, R², R³, R⁴, R⁶and R⁷ have the same definition as mentioned above.

The reaction of each step may be, for example, performed bycorresponding to the methods reported in International PatentPublication WO 97/07104 publication, or for example performed accordingto the following methods.

1) A method to produce compound [II] from compound [I]

Compound [II] may be produced by previously reacting the α-dihalocompound having the formula

R⁶C(═O)CV₂R⁷

wherein, R⁶ and R⁷ have the same definition as mentioned above, and Vrepresents iodine, bromine or chlorine, with water in the presence of abase, to obtain the carbonyl derivative having the formula

R⁶C(═O)C(═O)R⁷

wherein, R⁶ and R⁷ have the same definition as mentioned above,(hereinafter, Reaction 1), and subsequently, reacting with compound [I](hereinafter, Reaction 2). The carbonyl derivative having the formula

R⁶C(═O)C(═O)R⁷

wherein, R⁶ and R⁷ have the same definition as mentioned above, may alsobe reacted in water or alcohol as a hydrate or acetal derivative.

Reaction 1 is usually performed within a solvent. The limits to thereaction temperature are usually from 20 to 100° C., and the limits tothe reaction time are usually from a moment to 24 hours. For the amountsof the agents used in the reaction, based on 1 mole of α-dihalo compoundhaving the formula (R⁶C(═O)CV₂R⁷), a rate of 2 moles is the theoreticalamount of each water and the base, but may be optionally altered tocorrespond to the condition of the reaction.

As the base, organic bases and inorganic bases both may be utilized, andfor example, sodium acetate and potassium acetate may be set forth.

As the solvent, aliphatic hydrocarbons such as hexane, heptane, ligroin,cyclohexane and petroleum ether; aromatic hydrocarbons such as benzene,toluene and xylene; halogenated hydrocarbons such as chlorobenzene anddichlorobenzene, ethers such as diethyl ethers, diisopropyl ether,dioxane, THF and ethylene glycol dimethyl ether; esters such as ethylformate, ethyl acetate, butyl acetate and diethyl carbonate; nitrocompounds such as nitromethane and nitrobenzene; nitriles such asacetonitrile and isobutylonitrile; acid amides such as DMF; tertiaryamines such as pyridine, triethylamine, diisopropylethylamine,N,N-dimethylaniline, N,N-diethylaniline and N-methylmorpholine; sulfurcompounds such as DMSO and sulfolane; alcohols such as methanol,ethanol, ethylene glycol, isopropanol and t-butanol; or water a mixturethereof may be set forth.

Reaction 2 is usually performed within a solvent. The limits to thereaction temperature are usually from −20 to 200° C., and the limits tothe reaction time are usually from a moment to 72 hours. For the amountsof the agents used in the reaction, based on 1 mole of α-dihalo compoundutilized in Reaction 1, a rate of 1 mole is the theoretical amount ofcompound [I], but may be optionally altered to correspond to thecondition of the reaction. Furthermore, the salt of compound [I] (forexample, hydrochloric acid salt or sulfuric acid salt) may be utilizedto correspond with the condition of the reaction.

As the solvent, aliphatic hydrocarbons such as hexane, heptane, ligroin,cyclohexane and petroleum ether; aromatic hydrocarbons such as benzene,toluene and xylene; halogenated hydrocarbons such as chloroform, carbontetrachloride, dichloromethane, dichloroethane, chlorobenzene anddichlorobenzene; ethers such as diethyl ether, diisopropyl ether,dioxane, THF and ethylene glycol dimethyl ether; esters such as ethylformate, ethyl acetate, butyl acetate and diethyl carbonate; nitrocompounds such as nitromethane and nitrobenzene; nitriles such asacetonitrile and isobutylonitrile; acid amides such as formamide, DMFand acetamide; tertiary amines such as pyridine, triethylamine,diisopropylethylamine, N,N-dimethylaniline, N,N-diethylaniline andN-methylmorpholine; sulfur compounds such as DMSO and sulfolane; fattyacids such as formic acid, acetic acid and propionic acid; alcohols suchas methanol, ethanol, ethylene glycol, isopropanol and t-butanol; water;or a mixture thereof are set forth.

After the completion of the reaction, the precipitated crystals may becollected by filtration or the reaction mixture may be subjected to theordinary post-treatment such as extraction with an organic solvent andconcentration. If necessary, a purification procedure such aschromatography and recrystallization may be conducted. Thus theobjective material may be isolated.

2) A method to produce compound [IV] from compound [II]

Compound [IV] may be produced by reacting compound [II] and thephosphorane compound having the formula

Ar₃P═C(R⁵ )COOR³⁰

wherein, R⁵⁰ has the same definition as mentioned above, R³⁰ representsC₁-C₆ alkyl such as methyl or ethyl, Ar represents a phenyl that mayhave substituent(s) such as phenyl..

The said reaction is usually performed within a solvent. The limits tothe reaction temperature are usually from −20 to 150° C., preferablyfrom 0 to 100° C., and the limits to the reaction time are usually froma moment to 72 hours. For the amounts of the agents used in thereaction, based on 1 mole of compound [II], a rate of 1 mole is thetheoretical amount of phosphorane, but may be optionally altered tocorrespond to the condition of the reaction.

As solvents that may be utilized, aliphatic hydrocarbons such as hexane,heptane, ligroin, cyclohexane and petroleum ether; aromatic hydrocarbonssuch as benzene, toluene and xylene; ethers such as diethyl ether,diisopropyl ether, dioxane, THF and ethylene glycol dimethyl ether;nitro compounds such as nitromethane and nitrobenzene; acid amides suchas formamide, DMF and acetamide; tertiary amines such as pyridine,triethylamine, diisopropylethylamine, N,N-dimethylaniline,N,N-diethylaniline and N-methylmorpholine; sulfur compounds such as DMSOand sulfolane; alcohols such as methanol, ethanol, ethylene glycol,isopropanol and t-butanol; water; or a mixture thereof are set forth.

After the completion of the reaction, the reaction mixture may besubjected to distillation to remove the reaction solvent and then theresidue may be subjected to chromatography, or the reaction mixture maybe subjected to the ordinary post-treatment such as extraction with anorganic solvent and concentration. If necessary, further purificationsuch as chromatography and recrystallization may be conducted. Thus theobjective material can be isolated.

(production method 3)

A production method that complies to the following scheme:

wherein R¹, R², R³, R⁴, R⁵ and R⁶ have the same definition as mentionedabove.

1) A method to produce compound [VI] from compound [V]

Compound [VI] may be produced by reacting compound [V] with sodium boronhydride.

The reaction is usually performed within a solvent. The limits to thereaction temperature are usually from −10 to 50° C., and the limits tothe reaction time are usually from a moment to 12 hours. For the amountsof the agents used in the reaction, based on 1 mole compound [V], a rateof 0.25 mole is the theoretical amount of sodium boron hydride, but maybe optionally altered to correspond to the condition of the reaction.

As the solvent, ethers such as dioxane and THF, alcohols such asmethanol and ethanol, or a mixture thereof may be set forth.

After the completion of the reaction, the reaction mixture may be pouredinto water and subjected to the ordinary post-treatment such asextraction with an organic solvent and concentration. If necessary,further purification procedure such as chromatography andrecrystallization may be conducted. Thus the objective material may beisolated.

2) A method to produce compound [VII] from compound [VI]

Compound [VII] may be produced by reacting compound [VI] with compound[I].

The reaction is usually performed within a solvent. The limits to thereaction temperature are usually from 50 to 120° C., and the limits tothe reaction time are usually from a moment to 72 hours. For the amountsof the agents used in the reaction, based on 1 mole compound [VI], arate of 1 mole is the theoretical amount of compound [I], but may beoptionally altered to correspond to the condition of the reaction.

As the solvent, organic acids such as acetic acid and propionic acid maybe set forth.

After the completion of the reaction, the reaction mixture may be pouredinto water to correct the precipitated crystals or may be subjected tothe ordinary post-treatment such as extraction with an organic solventand concentration. If necessary, further purification procedure such aschromatography and recrystallization may be conducted. Thus theobjective material may be isolated.

Hereinafter, the production methods of the intermediates or rawmaterials used when producing the present invention compounds are setforth.

The pyridazinone derivative of Chemical Formula 5 which is the rawmaterial utilized when producing the present invention compounds byproduction method 1 may be produced, for example, according to thefollowing production method 4 or 5.

(production method 4)

A production method according to the following scheme given in ChemicalFormula 8:

wherein, R¹⁰⁰, R¹⁰¹, R¹⁰² and R³⁰ have the same definition as mentionedabove, and R³¹ represents amino, C₁-C₆ alkyl such as methyl, ethyl andt-butyl, or C₁-C₆ alkoxy such as methoxy, ethoxy and t-butoxy.

The reaction conditions for each procedure are given, for example,below.

1) A method to produce compound [A2] from compound [A1]

Compound [A2] may be produced by previously reacting the α-dihalocompound having the formula

R¹⁰¹C(═O)CV₂R¹⁰²

wherein, R¹⁰¹, R¹⁰² and V have the same definition as mentioned abovewith water in the presence of a base to obtain the carbonyl derivativehaving the formula

R¹⁰¹C(═O)C(═O)R¹⁰²

wherein, R¹⁰¹ and R¹⁰² have the same definition as mentioned above(reaction 1), and subsequently, reacting with compound [A1] (reaction2). The carbonyl derivative having the formula

R¹⁰¹C(═O)C(═O)R¹⁰²

wherein, R¹⁰¹ and R¹⁰² have the same definition as mentioned above mayalso be reacted in water or alcohol, and as a hydrate or acetalderivative.

Reaction 1 is usually performed within a solvent. The limits to thereaction temperature are usually from 20 to 100° C., and the limits tothe reaction time are usually from a moment to 24 hours. For the amountsof the agents used in the reaction, based on 1 mole of α-dihalo compoundR¹⁰¹C(═O)CV₂R¹⁰², a rate of 2 moles is the theoretical amount of eachwater and the base, but may be optionally altered to correspond to thecondition of the reaction.

As the base that may be used, organic bases and inorganic bases both maybe utilized, and for example, sodium acetate, potassium acetate and thelike may be set forth.

As the solvent, aliphatic hydrocarbons such as hexane, heptane, ligroin,cyclohexane and petroleum ether; aromatic hydrocarbons such as benzene,toluene and xylene; halogenated hydrocarbons such as chlorobenzene anddichlorobenzene, ethers such as diethyl ethers, diisopropyl ether,dioxane, THF and ethylene glycol dimethyl ether; esters such as ethylformate, ethyl acetate, butyl acetate and diethyl carbonate; nitrocompounds such as nitromethane and nitrobenzene; nitriles such asacetonitrile and isobutylonitrile; acid amides such as DMF; tertiaryamines such as pyridine, triethylamine, diisopropylethylamine,N,N-dimethylaniline, N,N-diethylaniline and N-methylmorpholine; sulfurcompounds such as DMSO and sulfolane; alcohols such as methanol,ethanol, ethylene glycol, isopropanol and t-butanol; or a mixturethereof are set forth.

Reaction 2 is usually performed within a solvent. The limits to thereaction temperature are usually from −20 to 200° C., and the limits tothe reaction time are usually from a moment to 72 hours. For the amountof the agents used in the reaction, based on 1 mole of α-dihalo compoundutilized in reaction 1, a rate of 1 mole is the theoretical amount ofcompound [A1], but may be optionally altered to correspond to thecondition of the reaction. Furthermore, the salt of compound [A1] (forexample, hydrochloric acid salts or sulfuric acid salts) may utilized tocorrespond with the condition of the reaction.

As the solvent, aliphatic hydrocarbons such as hexane, heptane, ligroin,cyclohexane and petroleum ether; aromatic hydrocarbons such as benzene,toluene and xylene; halogenated hydrocarbons such as chloroform, carbontetrachloride, dichloromethane, dichloroethane, chlorobenzene anddichlorobenzene; ethers such as diethyl ether, diisopropyl ether,dioxane, THF and ethylene glycol dimethyl ether; esters such as ethylformate, ethyl acetate, butyl acetate and diethyl carbonate; nitrocompounds such as nitromethane and nitrobenzene; nitriles such asacetonitrile and isobutylonitrile; acid amides such as formamide, DMFand acetamide; tertiary amines such as pyridine, triethylamine,diisopropylethylamine, N,N-dimethylaniline, N,N-diethylaniline andN-methylmorpholine; sulfur compounds such as DMSO and sulfolane; fattyacids such as formic acid, acetic acid and propionic acid; alcohols suchas methanol, ethanol, ethylene glycol, isopropanol and t-butanol; water;or a mixture thereof are set forth.

After the completion of the reaction, the reaction mixture may befiltered to collect the precipitated crystals or may be subjected to theordinary post-treatment such as extraction with an organic solvent andconcentration, and if necessary, may be further purified by theprocedure such as chromatography and recrystallization. Thus objectivematerial can be isolated.

2) A method to produce compound [A3] from compound [A2]

Compound [A3] may be produced by reacting compound [A2] with thephosphorane compound having the formula

Ar₃P═C(R¹⁰⁰)COOR³⁰

wherein, R¹⁰⁰, R³⁰ and Ar have the same definition as mentioned above.

The said reaction is usually performed within a solvent. The limits tothe reaction temperature are usually from −20 to 150° C., preferablyfrom 0 to 100° C., and the limits to the reaction time are usually froma moment to 72 hours. For the amounts of the agents used in thereaction, based on 1 mole of compound [A2], a rate of 1 mole is thetheoretical amount of phosphorane, but may be optionally altered tocorrespond to the condition of the reaction.

As the solvents that may be utilized, aliphatic hydrocarbons such ashexane, heptane, ligroin, cyclohexane and petroleum ether; aromatichydrocarbons such as benzene, toluene and xylene; ethers such as diethylether, diisopropyl ether, dioxane, THF and ethylene glycol dimethylether; nitro compounds such as nitromethane and nitrobenzene; acidamides such as formamide, DMF and acetamide; tertiary amines such aspyridine, triethylamine, diisopropylethylamine, N,N-dimethylaniline,N,N-diethylaniline and N-methylmorpholine; sulfur compounds such as DMSOand sulfolane; alcohols such as methanol, ethanol, ethylene glycol,isopropanol and t-butanol; water; or a mixture thereof are set forth.

After the completion of the reaction, the reaction mixture may besubjected to distillation to remove the reaction solvent and then theresidue may be subjected to chromatography, or the reaction mixture maybe subjected to the ordinary post-treatment such as extraction with anorganic solvent and concentration. If necessary, further purificationsuch as chromatography and recrystallization may be conducted. Thus theobjective material can be isolated.

3) A method to produce compound [A4] from compound [A3]

Compound [A4] may be produced by performing a intramolecular cyclizationreaction with compound [A3] in the presence of an acid. The saidreaction is usually performed within a solvent. The limits to thereaction temperature are usually from 0 to 200° C., preferably from 50to 150° C., and the limits to the reaction time are usually from amoment to 72 hours.

As the acid, inorganic acids such as hydrochloric acid and sulfuricacid, or organic acids such as trifluoroacetic acid andp-toluenesulfonic acid may be set forth. The amount of the acid used inthe reaction is ratio of a catalytic amount to an excess amount based on1 mole of compound [A3].

As the solvent, aliphatic hydrocarbons such as hexane, heptane, ligroin,cyclohexane and petroleum ether; aromatic hydrocarbons such as benzene,toluene and xylene; halogenated hydrocarbons such as chloroform, carbontetrachloride, dichloromethane, dichloroethane, chlorobenzene anddichlorobenzene; ethers such as diethyl ether, diisopropyl ether,dioxane, THF and ethyleneglycol dimethyl ether; ketones such as acetone,methylethyl ketone, methylisobutyl ketone, isophorone and cyclohexanone;nitro compounds such as nitromethane and nitrobenzene; sulfur compoundssuch as DMSO and sulfolane; fatty acids such as formic acid, acetic acidand propionic acid; alcohols such as methanol, ethanol, ethylene glycol,isopropanol and t-butanol; water, or a mixture of thereof may be setforth.

After the completion of the reaction, the reaction mixture may befiltered to collect the precipitated crystals or may be subjected to theordinary post-treatment such as extraction with an organic solvent andconcentration, and if necessary, may be further purified by theprocedure such as chromatography and recrystallization. Thus objectivematerial can be isolated.

(production method 5)

A production method according to the following scheme.

wherein, R⁵ and R⁶ have the same definition as mentioned above, and R⁴⁰represents hydrogen, carbamoyl, formyl or C₁-C₆ alkylcarbonyl such asacetyl and propionyl.

Compound [A6] may be produced by reacting compound [VI] with compound[A5].

The reaction is usually performed within a solvent. The limits to thereaction temperature are usually from 0 to 120° C., and the limits tothe reaction time are usually from a moment to 72 hours. For the amountsof the agents used in the reaction, based on 1 mole compound [VI], arate of 1 mole is the theoretical amount of compound [A5], but may beoptionally altered to correspond to the condition of the reaction.

As the solvent, organic acids such as acetic acid and propionic acid maybe set forth.

After the completion of the reaction, the reaction mixture may be pouredinto water to correct the precipitated crystals or may be subjected tothe ordinary post-treatment such as extraction with an organic solventand concentration. If necessary, further purification procedure such aschromatography and recrystallization may be conducted. Thus theobjective material may be isolated.

The benzyl derivative of Chemical Formula 6 may be a product from themarket, for example; public knowledge from U.S. Pat. No. 5,683,966, thespecification of international patent publication WO 95/04461,international patent publication WO 97/35845, and international patentpublication WO 95/47607; may be produced by corresponding to the methodsdisclosed in thereof; or produced by corresponding to the methoddisclosed in Jikken Kagaku Kouza (Maruzen Company Ltd.) 4th edition,volume 19, pages 364 to 482.

Compound [V] may be product from the market, or it may be produced froma compound which is produced by corresponding to the method disclosed inSynthetic Organic Chemistry (John Wiley & Sons, Inc.) 5th edition, page560.

Moreover, compound [I] may be a product from the market, or it may beproduced by corresponding to the method disclosed in Jikken Kagaku Kouza(Maruzen Company Ltd.) 4^(th) edition, volume 20, pages 338 to 342 forexample, or by corresponding to the following method of productionmethod 6.

(production method 6)

A production method that complies to the following scheme given inChemical Formula 9:

[Chemical Formula 9]

wherein, R¹, R², R^(3,) R⁴ and X have the same definition as mentionedabove.

Compound [I] may be produced by reacting compound [B2] and NH₂NH₂ withina solvent and in the presence of a base. The NH₂NH₂ utilized in the saidreaction may also be reacted as a hydrochloric acid salt, sulfuric acidsalt, or a hydrate amount of NH₂NH₂: based on 1 mole of compound [B2], arate from 1 to 10 moles base: sodium hydroxide, potassium carbonateamount of base: based on 1 mole of compound [B2], a rate from 1 to 10moles

solvent: ethanol, etc.

temperature: −20 to 100° C.

time: a moment to 24 hours

After the completion of the reaction, the reaction mixture may besubjected to distillation to remove the reaction solvent and then theresidue may be subjected to chromatography or the reaction mixture maybe poured into water and then the ordinary post-treatment such asextraction with an organic solvent and concentration may be performed.If necessary, the further purification procedure such as chromatographyand recrystallization may be subjected. Thus the objective material canbe isolated.

The present invention compounds possess herbicidal activity and inaddition, some of them show excellent selectivity between crops andweeds. The present invention compounds possess excellent herbicidalactivity against the following variation of weeds that cause problems infoliar or soil treatment on upland fields.

Polygonaceous weeds:

wild buckwheat (Polygonum convolvulus), pale smartweed (Polygonumlapathifolium), pennsylvania smartweed (Polygonum pensylvanicum),ladysthumb (Polygonum persicaria), curly dock (Rumex crispus), broadleafdock (Rumex obtusifolius), Japanese knotweed (Polygonum cuspidatum)

Portulacaceous weeds:

common purslane (Portulaca oleracea)

Caryophyllaceous weeds:

common chickweed (Stellaria media)

Chenopodiaceous weeds:

common lambsquarters (Chenopodium album), kochia (Kochia scoparia)

Amaranthaceous weeds:

redroot pigweed (Amaranthus retroflexus), smooth pigweed (Amaranthushybridus)

Cruciferous (brassicaceous) weeds:

wild radish (Raphanus raphanistrum), wild mustard (Sinapis arvensis),shepherdpurse (Capsella bursa-pastoris)

Leguminous (fabaceous) weeds:

hemp sesbania (Sesbania exaltata), sicklepod (Cassia obtusifolia),Florida beggarweed (Desmodium tortuosum), white clover (Trifoliumrepens)

Malvaceous weeds:

velvetleaf (Abutilon theophrasti), prickly sida (Sida spinosa)

Violaceous weeds:

field pansy (Viola arvensis), wild pansy (Viola tricolor)

Rubiaceous weeds:

catchweed bedstraw (cleavers) (Galium aparine)

Convolvulaceous weeds:

ivyleaf morningglory (Ipomoea hederacea), tall morningglory (Ipomoeapurpurea), entireleaf morningglory (Ipomoea hederacea var.integriuscula), pitted morningglory (Ipomoea lacunosa), field bindweed(Convolvulus arvensis)

Labiate weeds:

red deadnettle (Lamium purpureum), henbit (Lamium amplexicaule)

Solanaceous weeds:

jimsonweed (Datura stramonium), black nightshade (Solanum nigrum)

Scrophulariaceous weeds:

birdseye speedwell (Veronica persica), ivyleaf speedwell (Veronicahederaefolia)

Composite weeds:

common cocklebur (Xanthium pensylvanicum), common sunflower (Helianthusannuus), scentless chamomile (Matricaria perforata or inodora), cornmarigold (Chrysanthemum segetum), pineappleweed (Matricariamatricarioides), common ragweed (Ambrosia artemisiifolia), giant ragweed(Ambrosia trifida), horseweed (Erigeron canadensis), Japanese mugwort(Artemisia princeps), tall goldenrod (Solidago altissima)

Boraginaceous weeds:

forget-me-not (Myosotis arvensis)

Asclepiadaceous weeds:

common milkweed (Asclepias syriaca)

Euphorbiaceous weeds:

sun spurge (Euphorbia helioscopia), spotted spurge (Euphorbia maculata)

Graminaceous weeds:

barnyardgrass (Echinochloa crus-galli), green foxtail (Setaria viridis),giant foxtail (Setaria faberi), large crabgrass (Digitaria sanguinalis),goosegrass (Eleusine indica), annual bluegrass (Poa annua), blackgrass(Alopecurus myosuroides), wild oats (Avena fatua), johnsongrass (Sorghumhalepense), quackgrass (Agropyron repens), downy brome (Bromustectorum), bermudagrass (Cynodon dactylon), fall panicum (Panicumdichotomiflorum), Texas panicum (Panicum texanum), shattercane (Sorghumvulgare)

Commelinaceous weeds:

common dayflower (Commelina communis)

Equisetaceous weeds:

field horsetail (Equisetum arvense)

Cyperaceous weeds:

rice flatsedge (Cyperus iria), purple nutsedge (Cyperus rotundus),yellow nutsedge (Cyperus esculentus)

Furthermore, some of the present invention compounds exhibit nosignificant phytotoxicity on the main crops such as corn (Zea mays),wheat (Triticum aestivum), barley (Hordeum vulgare), rice (Oryzasativa), sorghum (Sorghum bicolor), soybean (Glycine max), cotton(Gossypium spp.), sugar beet (Beta vulgaris), peanut (Arachis hypogaea),sunflower (Helianthus annuus), and canola (Brassica napus);horticultural crops such as flowers and ornamental plants; andvegetables. Various weeds that may cause some trouble in the no-tillagecultivation of soybean (Glycine max), corn (Zea mays), wheat (Triticumaestivum), or the like may be efficaciously controlled by the presentinvention compounds. Furthermore, some of the present inventioncompounds exhibit no significant phytotoxicity on the crops.

The present invention compounds also have herbicidal activity againstvarious weeds which may cause some trouble in the flooding treatment onpaddy fields, such as the listed below.

Graminaceous weeds:

barnyardgrass (Echinochloa oryzicola)

Scrophulariaceous weeds:

common falsepimpernel (Lindernia procumbens)

Lythraceous weeds:

Indian toothcup (Rotala indica), red stem (Ammannia multiflora)

Elatinaceous weeds:

waterwort (Elatine triandra)

Cyperaceous weeds:

smallflower umbrella sedge (Cyperus difformis), hardstem bulrush(Scirpus juncoides), needle spikerush (Eleocharis acicularis), waternutgrass (Cyperus serotinus), water chestnut (Eleocharis kuroguwai)

Pontederiaceous weeds:

monochoria (Monochoria vaginalis)

Alismataceous weeds:

arrowhead (Sagittaria pygmaea), arrowhead (Sagittaria trifolia),waterplantain (Alisma canaliculatum)

Potamogetonaceous weeds:

roundleaf pondweed (Potamogeton distinctus)

Umbelliferous weeds:

watercelery sp. (Oenanthe javanica)

Furthermore, some of the present invention compounds exhibit nosignificant phytotoxicity on transplanted paddy rice.

The present invention compounds can also control a wide variety of weedswhich grow or will grow in the orchards, grasslands, lawns, forests,waterways, canals, or other uncultivated lands. In addition, the presentinvention compounds also have herbicidal activity against variousaquatic weeds, such as water hyacinth (Eichhornia crassipes), which growor will grow by waterways or canals.

The present invention compounds have substantially the samecharacteristics as those of the herbicidal compounds disclosed in thespecification of international patent publication WO 95/34659. In thecase of cultivating crops wherein tolerance is bestowed to the saidcrops by introducing a herbicide tolerance gene described in saidspecification, the present invention compounds can be used at largeramounts than those used when ordinary crops without tolerance arecultivated, thus making it possible to control other unfavorable weedsmore effectively.

When one of the present invention compounds is used as the activeingredient of a herbicide, the present invention compound is usuallymixed with solid or liquid carriers or diluents, surfactants, and otherauxiliary agents to formulate emulsifiable concentrates, wettablepowders, flowables, granules, concentrated emulsions, water-dispersiblegranules, or other formulations.

These formulations may comprise a compound of present invention as anactive ingredient at an amount from 0.001% to 80% by weight, preferablyfrom 0.005% to 70% by weight.

The solid carrier or diluent may include, for example, mineral finepowders such as kaolin clay, attapulgite clay, bentonite, acid clay,pyrophyllite, talc, diatomaceous earth, and calcite; organic finepowders such as walnut shell powder; water-soluble organic fine powderssuch as urea; fine powders of inorganic salts such as ammonium sulfate;and fine powders of synthetic hydrated silicon oxide.

The liquid carrier or diluent may include, for example, aromatichydrocarbons such as methylnaphthalene, phenylxylylethane andalkylbenzene (e.g., xylene); alcohols such as isopropanol, ethyleneglycol and 2-ethoxyethanol; esters such as dialkyl ester phthalate;ketones such as acetone, cyclohexanone and isophorone; mineral oils suchas machine oil; vegetable oils such as soybean oil and cottonseed oil;dimethylsulfoxide, N,N-dimethylformamide, acetonitrile,N-methylpyrrolidone and water.

As the surfactant used for emulsion, dispersing or spreading; anionicsurfactants such as alkylsulfate salts, alkylsulfonate salts,alkylarylsulfonate salts, dialkylsulfosuccinate salts andpolyoxyethylene alkylarylether phosphate salts and nonionic surfactantssuch as polyoxyethylene alkylether, polyoxyethylene alkylarylether,polyoxyethylene polyoxypropylene block copolymers, sorbitan fatty acidesters and polyoxyethylene sorbitan fatty acid ester are set forth.

Lignin sulfonates, alginates, polyvinyl alcohol, gum arabic, CMC(carboxymethylcellulose), and PAP (isopropyl acid phosphate) and thelike are set forth as the other possible auxiliary agents forformulation.

The present invention compounds are usually formulated and then used forsoil treatment before or after the weed has emerged from the soil, forfoliar treatment or for flooding treatment. The soil treatment mayinclude a soil surface treatment and a soil incorporation. The foliartreatment may include application over the plants and directedapplication in which it is applied only to weeds, so as to keep the sameoff the crop plants.

Furthermore, by intermixing with other herbicides, there are situationswherein an enhanced herbicidal efficacy is confirmed. Furthermore, thepresent invention compounds may be used in a mixture or in combinationwith insecticides, acaricides, nematocides, fungicides, bactericides,plant growth regulators, fertilizers, and soil improvements.

Examples of the herbicides include atrazine, cyanazine, dimethametryn,metribuzin, prometryn, simazine, simetryn, chlorotoluron, diuron,daimuron, fluometuron, isoproturon, linuron, methabenzthiazuron,bromoxynil, ioxynil, ethalfluralin, pendimethalin, trifluralin,acifluorfen, acifluorfen-sodium, bifenox, chlomethoxynil, fomesafen,lactofen, oxadiazon, oxadiargyl, oxyfluorfen, carfentrazone-ethyl,flumiclorac-pentyl, flumioxazine, fluthiacet-methyl, sulfentrazone,thidiazimin, azafenidin, pyraflufen-ethyl, cinidon-ethyl, difenzoquat,diquat, paraquat, 2,4-D, 2,4-DB, DCPA, MCPA, MCPB, clomeprop,clopyralid, dicamba, dithiopyr, fluroxypyr, mecoprop, naploanilide,phenothiol, quinclorac, triclopyr, thiazopyr, acetochlor, alachlor,butachlor, diethatyl-ethyl, metolachlor, pretilachlor, propachlor,bensulfuron-methyl, chlorsulfuron, chlorimuron-ethyl,halosulfuron-methyl, metsulfuron-methyl, nicosulfuron,primisulfuron-methyl, pyrazosulfuron-ethyl, sulfometuron-ethyl,thifensulfuron-methyl, triasulfuron, tribenuron-methyl, oxasulfuron,iodosulfuron, azimsulfuron, cloransulam-methyl, cyclosulfamuron,flumetsulam, flupyrsulfuron, flazasulfuron, imazosulfuron, metosulam,diclosulam, prosulfuron, rimsulfuron, triflusulfuron-methyl,ethoxysulfuron, sulfosulfuron, imazamethabenz-methyl, imazapyr,imazaquin, imazethapyr, imazameth, imazamox, flucarbazone, pyribenzoxim,bispyribac-sodium, pyriminobac-methyl, pyrithiobac-sodium,alloxydim-sodium, clethodim, sethoxydim, tralkoxydim, tepraloxydim,dichlofop-methyl, fenoxaprop-ethyl, fenoxaprop-p-ethyl, fluazifop-butyl,fluazifop-p-butyl, haloxyfop-methyl, quizalofop-p-ethyl,cyhalofop-butyl, clodinafop-propargyl, benzofenap, clomazone,diflufenican, norflurazon, pyrazolate, pyrazoxyfen, flurtamone,isoxaflutole, sulcotrione, mesotrione, isoxachlortole,glufosinate-ammonium, glyphosate, bentazone, benthiocarb, bromobutide,butamifos, butylate, dimepiperate, dimethenamid, fentrazamide, DSMA,EPTC, esprocarb, isoxaben, mefenacet, molinate, MSMA, piperophos,pyributicarb, propanil, pyridate, triallate, cafenstrol, flupoxam,fluthiamide, diflufenzopyr, triaziflam, pentoxazone, epoprodan,metobenzuron, oxaziclomefone, isopropazol, and indanofan.

The above compounds are disclosed in the catalog of Farm ChemicalsHandbook, 1995 (published by Meister Publishing Company); AG CHEM NEWCOMPOUND REVIEW, VOL. 13, 1995, VOL. 15, 1997 and VOL. 16, 1998(published by AG CHEM INFORMATION SERVICES); and “Josouzai KenkyuSouran” (published by Hakuyu-sha).

In the case when the present invention compound is utilized as an activeingredient of an herbicide, the application amount may vary with theweather conditions, formulation types, application timing, applicationmethod, soil conditions, objective crop or crops, objective weed orweeds, and so on, but is usually applied at 0.0 g to 20,000 g perhectare, preferably 1 g to 2,000 g per hectare. When the presentinvention compound is formulated into emulsifiable concentrates,wettable powders, flowables, concentrated emulsions, water-dispersiblegranules, or the like, the said formulations are applied by diluting thepresent compound invention usually in 10L to 1,000L (if necessary, thewater may include adjuvant such as a spreading agent) so the prescribedamount of the active ingredient can be applied to each hectare. Granuleformulations and some types of flowables are usually applied withoutdiluting.

The adjuvant which can be used herein, if necessary, may include, inaddition to the surfactants as described above, polyoxyethylene resinacids (esters), lignin sulfonates, abietates,dinaphthylmethanedisulfonates, crop oil concentrates, and vegetable oilssuch as soybean oil, corn oil, cottonseed oil, and sunflower oil. Thepresent invention compounds can also be used as the active ingredientsof harvesting aids such as defoliants and desiccants for cotton(Gossipyum spp.), and desiccants for potato (Solanum tuberosum). Inthese cases, the present invention compounds are usually formulated inthe same manner as the case where they are used as the activeingredients of herbicides, and may be used alone or in admixture withother harvesting aids for foliar treatment before harvesting the crops.

Hereinafter, the present invention is explained more specifically bymeans of the production examples, formulation examples and testexamples, but the said examples do not limit the present invention inany way.

Production Example 1 (the production of the present invention compound1-1)

1) Method to produce compound [1b] from compound [1a]

In a solution of 2.2 g of 1,1-dibromo-3,3,3-trifluoroacetone and 25 mLof water, 4.9 g of sodium acetate trihydrate was incorporated, and washeated for 1.5 hours at 10 80° C. After cooling the reaction mixture toroom temperature, 0.40 g of compound [1a] was incorporated. Afterstirring the mixture at room temperature for 1 hour, water was added,then extracted with diethyl ether. After drying the obtained organiclayer with magnesium sulfate anhydride, the said organic layer wasconcentrated under reduced pressure to give 0.65 g of compound [1b].

[¹H-NMR(300 MHz, CDCl₃, TMS δ (ppm)); 2.38 (3H, s), 7.41 (1H, br), 10.30(1H, br)]

2) Method to produce compound [1c] from compound [1b]

In a solution of 0.64 g of compound [1b] and 10 mL of tetrahydrofuran,1.4 g of Ph₃P═CHCO₂C₂H₅ wherein Ph represents phenyl was added under icecooling, and then stirred at room temperature for 2 hours. After thecompletion of the reaction, the obtained mixture had water added and wasextracted with diethylether. After drying the organic layer by utilizingmagnesium sulfate anhydride, the said organic layer was concentratedunder reduced pressure and had the residue subjected to silica gelchromatography to give 0.75 g of compound [1c]. m.p. 76.5° C.

3) Method to produce compound [1d] from compound [1c]

Ten millimeters (10 mL) of concentrated hydrochloric acid was added to0.75 g of compound [1c]. The mixture was stirred for 30 minutes at roomtemperature, and was subsequently stirred for 2 hours while heatingunder reflux. After then, water was added into the reaction mixture andthe mixture obtained was extracted with diethylether. After drying theorganic layer by utilizing magnesium sulfate anhydride, the said organiclayer was concentrated under reduced pressure to give 0.31 g of compound[1d].

m.p. 98.2° C.

4) Method to produce compound [1f] from compound [1d]

In a solution of 0.30 g of compound [1d], 5 mL of N,N-dimethylformamideand 0.28 g of potassium carbonate, 0.50 g of compound [1e] was droppedand was stirred for 30 minutes at room temperature. After then, dilutedhydrochloric acid was poured into the reaction mixture and the obtainedmixture was extracted with ethyl acetate. The organic layer was washedby utilizing an aqueous solution saturated with sodium chloride, driedby utilizing magnesium sulfate anhydride, and concentrated under reducedpressure. The resulting residue was subjected to column chromatographyto give 0.45 g of compound [1f] (the present inventioncompound 1-1).m.p. 93.5° C. compound [1e] was produced by the following productionmethod

To a solution of 5 mL of 2,3-dichlorotoluene and 50 mL of chloroform,7.13 g of N-bromosuccinimide and a catalytic amount of2,2′-azobisisobutylonitrile were added, then the obtained mixture wasstirred for 1 hour at room temperature, and heated under reflux for 1.5hours. Afterwards, an aqueous solution of sodium sulfite was added tothe reaction mixture, and the obtained mixture was extracted withchloroform. The organic layer was dried by utilizing magnesium sulfateanhydride, then concentrated under reduced pressure, and the resultingresidue was subjected to column chromatography to give 2.52 g ofcompound [1e].

[¹H-NMR(300MHz, CDCl₃, TMS δ (ppm)); 4.60 (2H, s), 7.19 (1H, t, J=7.8Hz), 7.36 (1H, dd, J=7.8 Hz, 1,4 Hz), 7.43 (1H, dd, J=7.8 Hz, 1.4 Hz)]

Production Example 2 (production of the present invention compound 2-1)

1) Method to produce compound [1 g] from compound [1b]

To a solution of 13 g of compound [1b] and 130 mL of tetrahydrofuran, 39g of Ph₃P═C(CH₃)CO₂C₂H₅ wherein Ph represents phenyl was added, and theobtained mixture was then left overnight. After stirring at 40° C. for 3hours, the mixture had water added and was then extracted with ethylacetate. Afterwards, the organic layer was washed by utilizing anaqueous solution saturated with sodium chloride, dried by utilizingmagnesium sulfate anhydride, and then concentrated under reducedpressure. The resulting residue was subjected to silica gel columnchromatography to give 6.0 g of compound [1g]. m.p. 94.5° C.

2) Method to produce compound [1h] from compound [1 g]

Eighty milliliters (80 mL) of concentrated hydrochloric acid was addedto 5.5 g of compound [1g], then the obtained mixture was stirred for 3hour while being heated under reflux. Afterwards, water was added to thereaction mixture and the resultant was extracted with ethyl acetate. Theorganic layer was washed by utilizing an aqueous solution saturated withsodium chloride, dried by utilizing magnesium sulfate anhydride, andthen concentrated under reduced pressure. The resulting residue wassubjected to silica gel column chromatography to give 0.9 g of compound[1h].

[¹H-NMR(300 MHz, CDCl₃, TMS δ (ppm)); 2.39 (3H, q, J=1.8 Hz), 7.96 (1H,s), 12.35 (1H, br)]

3) Method to produce compound [1i] from compound [1h]

To a solution of 0.40 g of compound [1h], 10 mL of N,N-dimethylformamideand 0.65 g of 2,3-dichlorobenzyl bromide, 0.38 g of potassium carbonatewas added under ice cooling, and the obtained mixture was then leftovernight at a room temperature. The reaction mixture then had dilutedhydrochloric acid added and was then extracted with ethyl acetate. Theorganic layer was washed by utilizing an aqueous solution saturated withsodium chloride, dried by utilizing magnesium sulfate anhydride, andthen concentrated under reduced pressure. The resulting residue waswashed by utilizing 2-propanol to give 0.42 g of compound [1i] (thepresent invention compound 2-1).

m.p. 105.8° C.

Production Example 3 (the production of intermediate compound [1d])

1) Method to produce compound [3b] from compound [3a]

To the solution of 158 g of 1,1-dibromo-3,3,3-trifluoroacetone and 1.5Lof water, 318 g of sodium acetate trihydrate was incorporated, and theobtained mixture was stirred while heating at 80° C. for 1.5 hours.After cooling the mixture to the room temperature, 50 g of compound [3a]was added, and then the obtained mixture was stirred at room temperaturefor 5.5 hours. The precipitated crystals were collected by filtrationand dried under reduced pressure to give 74 g of the crude compound[3b].

2) Method to produce compound [3c] from compound [3b]

To the solution of 7.0 g of compound [3b] and 50 ml of tetrahydrofuran,13.3 g of Ph₃P═CHCO₂C₂H₅ [wherein Ph represents phenyl.] was added, andthe obtained mixture was stirred at room temperature for 3 hours andleft overnight. After the completion of the reaction, the reactionmixture was concentrated. The obtained residue was dissolved in t-butylmethyl ether to remove insoluble matters and the obtained organic layerwas dried with magnesium sulfate and then concentrated to give 5.7 g ofthe compound [3c].

[¹H-NMR(250 MHz,CDCl₃, TMS δ (ppm)); 1.33(3H,t,J=7.1 Hz),4.27(2H,q,J=7.1Hz),6.51(1H,s),8.67(1H,s),9.93(1H,br)]

3) Method to compound [1d] from compound [3c]

To 57 g of compound [3c], 200ml of concentrated hydrochloric acid wasadded, and the obtained mixture was stirred while heating under refluxfor 4.5 hours. The reaction mixture was cooled to room temperature andthe precipitated crystals were collected by filtration to give 21.5 g ofcompound [1d].

Hereinafter, the present invention compounds are set forth in tables 1through 5 with assigned compound numbers, but the present inventioncompounds are not limited to the following.

The compound represented by the following formula:

TABLE 1 Compound No R¹ R² R³ R⁴ R⁶ R⁷ 1-1 Cl Cl H H CF₃ H 1-2 H Cl H ClCF₃ H 1-3 Cl Cl Cl H CF₃ H 1-4 H H NO₂ OCH₂CO₂Et CF₃ H 1-5 Cl Cl H OCH₃CF₃ H 1-6 Cl Cl H CH₃ CF₃ H 1-7 Cl Cl CF₃ H CF₃ H 1-8 H H Cl OCH₂CO₂EtCF₃ H 1-9 Cl Cl H OCH(CH₃)₂ CF₃ H 1-10 Cl CN NO₂ H CF₃ H 1-11 Cl Cl H HCF₂Cl H 1-12 Cl Cl H Cl CF₂CF₃ H 1-13 Cl Cl OCH(CH₃) H CF₃ H 1-14 H HNO₂ OEt CF₃ H 1-15 Cl Cl NH₂ H CF₃ H 1-16 Cl Cl H Cl CF₃ H 1-17 H H NO₂OMe CF₃ H 1-18 Cl Cl H NH₂ CF₃ H 1-19 Cl Cl H H CF₃ CH₃ 1-20 Cl ClCH₂OCH₃ H CF₃ H 1-21 H H NO₂ CO₂Me CF₃ H 1-22 H H Cl CO₂Et CF₃ H 1-23 HH Cl OCH(Me)CO₂Et CF₃ H 1-24 Cl Cl H Cl CF₂Cl H 1-25 H H Cl OEt CF₃ H

TABLE 2 Compound No R¹ R² R³ R⁴ R⁶ R⁷ 1-26 H H H OCH₂CO₂Et CF₃ H 1-27 HH NO₂ OCH(Me)CO₂Et CF₃ H 1-28 Cl Cl OCH₃ H CF₃ H 1-29 H H Cl OMe CF₃ H1-30 Cl OMe NO₂ H CF₃ H 1-31 H H H OCH(Me)CO₂Et CF₃ H 1-32 Cl Cl H ClCF₂CH₃ H 1-33 Cl Cl H CF₃ CF₃ H 1-34 Cl Cl H CH₂OCH₃ CF₃ H 1-35 Cl ClCH₃ H CF₃ H 1-36 Cl Cl H H CF₂Cl CH₃

The compound represented by the following formula:

TABLE 3 Compound No R¹ R² R³ R⁴ R⁶ R⁷ 2-1 Cl Cl H H CF₃ H 2-2 H Cl H ClCF₃ H 2-3 Cl Cl Cl H CF₃ H 2-4 H H NO₂ OCH₂CO₂Et CF₃ H 2-5 Cl Cl H OCH₃CF₃ H 2-6 Cl Cl H CH₃ CF₃ H 2-7 Cl Cl CF₃ H CF₃ H 2-8 H H Cl OCH₂CO₂EtCF₃ H 2-9 Cl Cl H OCH(CH₃)₂ CF₃ H 2-10 Cl CN NO₂ H CF₃ H 2-11 Cl Cl H HCF₂Cl H 2-12 Cl Cl H Cl CF₂CF₃ H 2-13 Cl Cl OCH(CH₃) H CF₃ H 2-14 H HNO₂ OEt CF₃ H 2-15 Cl Cl NH₂ H CF₃ H 2-16 Cl Cl H Cl CF₃ H 2-17 H H NO₂OMe CF₃ H 2-18 Cl Cl H NH₂ CF₃ H 2-19 Cl Cl H H CF₃ CH₃ 2-20 Cl ClCH₂OCH₃ H CF₃ H 2-21 H H NO₂ CO₂Me CF₃ H 2-22 H H Cl CO₂Et CF₃ H 2-23 HH Cl OCH(Me)CO₂Et CF₃ H 2-24 Cl Cl H Cl CF₂Cl H 2-25 H H Cl OEt CF₃ H

TABLE 4 Compound No R¹ R² R³ R⁴ R⁶ R⁷ 2-26 H H H OCH₂CO₂Et CF₃ H 2-27 HH NO₂ OCH(Me)CO₂Et CF₃ H 2-28 Cl Cl OCH₃ H CF₃ H 2-29 H H Cl OMe CF₃ H2-30 Cl OMe NO₂ H CF₃ H 2-31 H H H OCH(Me)CO₂Et CF₃ H 2-32 Cl Cl H ClCF₂CH₃ H 2-33 Cl Cl H CF₃ CF₃ H 2-34 Cl Cl H CH₂OCH₃ CF₃ H 2-35 Cl ClCH₃ H CF₃ H 2-36 Cl Cl H H CF₂Cl CH₃

The compound represented by the following formula:

TABLE 5 Compound No R¹ R² R³ R⁴ D¹ D² 3-1 Cl Cl H H CH₂CH₂CH₂ CH₂ 3-2 HCl H Cl CH₂CH₂CH₂ CH₂ 3-3 Cl Cl Cl H CH₂CH₂CH₂ CH₂ 3-4 Cl Cl H ClCH₂CH₂CH₂ CH₂ 3-5 Cl Cl H H CH₂CH₂ CH₂ 3-6 H Cl H Cl CH₂CH₂ CH₂ 3-7 ClCl H H CH₂CH₂CH₂ CF₂ 3-8 H Cl H Cl CH₂CH₂CH₂ CF₂ 3-9 Cl Cl Cl HCH₂CH₂CH₂ CF₂ 3-10 Cl Cl H Cl CH₂CH₂CH₂ CF₂

“Me” and “Et” in the above tables represent methyl and ethyl,respectively.

Physical data of some of the above-mentioned present invention compoundsare as follows:

Compound 1-2: m.p. 115.5° C.

Compound 1-9: m.p. 99.1° C.

Compound 1-16: m.p. 111.3° C.

Compound 1-17: m.p. 110.5° C.

Compound 1-21: m.p. 92.8° C.

Compound 1-31:

¹H-NMR (300 MHz, CDCl₃, TMS δ (ppm)) ; 1.25(3H,t,J=7.2 Hz),1.58-1.62(3H,m), 4.21(2H,q,J=7.2 Hz), 4.73(1H,q,J=6.9 Hz), 5.29(2H,s),6.80(1H,dd,J=2.2 Hz, 8.2 Hz), 6.95-6.97(1H,m), 7.03(1H,d,J=7.6 Hz),7.15-7.17(1H,m), 7.20-7.24(1H,m), 7.90(1H,d,J=2.2 Hz)

Compound 3-4:

¹H-NMR (300 MHz, CDCl₃, TMS δ (ppm)); 1.76-1.83(4H,m), 2.55-2.60(4H,m),5.40(2H,s), 6.93(1H,d,J=2.3 Hz), 7.39(1H,d,J=2.3 Hz), 7.55(1H,s)

Hereinafter, the formulation examples are given. The present inventioncompounds are now given with their assigned numbers from tables 1through 5. Parts represents parts by weight.

Formulation Example 1

Fifty (50) parts each of the present invention compound 1-1, 1-2, 1-9,1-16, 1-17, 1-21, 2-1 and 3-4,3 parts of calcium ligninsulfonate, 2parts of sodium laurylsulfate and 45 parts of synthetic hydrated siliconoxide are pulverized and mixed to obtain wettable powders for eachcompound.

Formulation Example 2

Ten (10) parts each of the present invention compound 1-1, 1-2, 1-9,1-16, 1-17, 1-21, 2-1 and 3-4, 14 parts of polyoxyethylene styrylphenylether, 6 parts of calcium dodecylbenzene sulfonate, 35 parts of xyleneand 35 parts cyclohexanone are mixed well to obtain emulsifiableconcentrates for each compound.

Formulation Example 3

Two (2) parts each of the present invention compound 1-1, 1-2, 1-9,1-16, 1-17, 1-21, 2-1 and 3-4, 2 parts of synthetic hydrated siliconoxide, 2 parts of calcium ligninsulfonate, 30 parts of bentonite and 64parts of kaolin clay are pulverized and mixed well. After the additionof water, the obtained mixture is kneaded, granulated, and then dried toobtain granules for each compound.

Formulation Example 4

Twenty-five (25) parts each of the present compound invention 1-1, 1-2,1-9, 1-16, 1-17, 1-21, 2-1 and 3-4, 50 parts of 10% aqueous solution ofpolyvinyl alcohol and 25 parts of water are mixed and wet-pulverizeduntil the average diameter becomes 5 μm or less to obtain flowables foreach compound.

Formulation Example 5

Into 40 parts each of 10% aqueous solution of polyvinyl alcohol, 5 partseach of the present invention compounds 1-1, 1-2, 1-9, 1-16, 1-17, 1-21,2-1 and 3-4 is added. Each obtained mixture is emulsified and dispersedwith a homogenizer until the average diameter becomes 10 μm or less, andincorporated with 55 parts of water to obtain concentrated emulsion foreach compound.

Hereinafter, the following test examples are provided, in order toevidence that the present invention compounds are effective as theactive ingredient of a herbicide.

Test Example 1 Foliage Treatment Test for Upland Field

Cylindrical plastic pots each having a diameter of 10 cm and a depth of10 cm were filled with soil and then seeded with ivyleaf morningglory(Ipomoea hederacea) and velvetleaf (Abutilon theophrasti). These testplants were grown in a greenhouse for 14 days. Afterwards, the presentinvention compound 1-1 was formulated into an emulsifiable concentrateaccording to Formulation Example 2 and then diluted to the prescribedamount with water containing a spreading agent, and the dilution wasuniformly sprayed over the foliage of the test plants with a sprayer ata rate of 1000 liters per hectare After the application, the test plantswere grown in the greenhouse for 8 days, and the herbicidal activity wasexamined. As a result, it was determined that the growth of ivyleafmorningglory and velvetleaf was completely controlled when compound 1-1was applied at the dosage of 500 g/ha.

Test Example 2 Soil Treatment Test for Upland Field

Cylindrical plastic pots each having a diameter of 10 cm and a depth of10 cm were filled with soil and then seeded with ivyleaf morningglory(Ipomoea hederacea). The present invention compound 1-1 was formulatedinto an emulsifiable concentrate according to Formulation Example 2 andthen diluted to the prescribed amount with water and the dilution wasuniformly sprayed over the surface of the soil with a sprayer at a rateof 1000 liters per hectare. After the application, the test plants weregrown in the greenhouse for 9 days, and the herbicidal activity wasexamined. It was determined that compound 1 - 1 completely controlledthe emergence of ivyleaf morningglory when applied at the dosage of 2000g/ha.

Test Example 3 Flooding Treatment Test for Paddy Field

Cylindrical plastic pots each having a diameter of 9 cm and a depth of11 cm were filled with soil and then seeded with barnyardgrass(Echinochloa oryzicola). After flooding the said pot until a paddy-fieldcondition was obtained, the test plant was grown in a greenhouse. Twelve(12) days later, the present invention compound 1-1, 2-1 and 3-4,wereformulated into emulsifiable concentrates according to FormulationExample 2, diluted to the prescribed amount with water, and were thentreated onto the surface of the water at a rate of 50L per are. Afterthe application, the test plants were grown in the greenhouse for 9days, and then the herbicidal activity was examined. It was determinedthat barnyard grass was completely controlled when compound 1-1, 2-1 and3-4 were applied at the dosage of 500 g/ha, respectively.

Test Example 4 Foliage Treatment Test for Upland Field

Cylindrical plastic pots each having a diameter of 10 cm and a depth of10 cm were filled with soil and then seeded with and velvetleaf(Abutilon theophrasti). The test plants were grown in a greenhouse for14 days. Afterwards, each of the present invention compound 1-1, 1-2,1-9, 1-16, 1-17, 1-21, 1-31, 2-1 and 3-4 was formulated into anemulsifiable concentrate according to Formulation Example 2 and thendiluted to the prescribed amount with water containing a spreadingagent, and the dilution was uniformly sprayed over the foliage of thetest plants with a sprayer at a rate of 1000 liters per hectare Afterthe application, the test plants were grown in the greenhouse for 16days, and the herbicidal activity was examined. As a result, it wasdetermined that the growth of velvetleaf was completely controlled whencompound 1-1, 1-2, 1-9, 1-16, 1-17, 1-21, 1-31, 2-1 and 3-4 were appliedat the dosage of 2,000 g/ha, respectively.

Test Example 5 Soil Treatment Test for Upland Field

Cylindrical plastic pots each having a diameter of 10 cm and a depth of10 cm were filled with soil and then seeded with ivyleaf morningglory(Ipomoea hederacea). Each of the present invention compound 1-16 and1-21 was formulated into an emulsifiable concentrate according toFormulation Example 2 and then diluted to the prescribed amount withwater and the dilution was uniformly sprayed over the surface of thesoil with a sprayer at a rate of 1000 liters per hectare. After theapplication, the test plants were grown in the greenhouse for 19 days,and the herbicidal activity was examined. Compounds 1-16 and 1-21completely controlled the emergence of ivyleaf morningglory,respectively when applied at the dosage of 2000 g/ha.

Test Example 6 Flooding Treatment Test for Paddy Field

Cylindrical plastic pots each having a diameter of 9 cm and a depth of11 cm were filled with soil and then seeded with barnyardgrass(Echinochloa oryzicola). After flooding the said pot until a paddy-fieldcondition was obtained, the test plant was grown in a greenhouse. Twelve(12) days later, the present invention compounds 1-1, 1-16, 1-17, 1-21,1-31 and 2-1 were formulated into emulsifiable concentrates according toFormulation Example 2, diluted to the prescribed amount with water, andwere then treated onto the surface of the water at a rate of 50L perare. After the application, the test plants were grown in the greenhousefor 19 days, and then the herbicidal activity was examined. It wasdetermined that barnyard grass was completely controlled when compounds1-1, 1-16, 1-17, 1-21, 1-31 and 2-1 were applied at the dosage of 1000g/ha, respectively.

Effect of Invention

By utilizing the present invention compound, an excellent herbicidalefficacy can be obtained.

What is claimed is:
 1. A pyridazinone derivative encompassed by thefollowing formula:

wherein, R¹ represents hydrogen, halogen, C₁-C₃ alkyl or C₁-C₃haloalkyl; R² represents hydrogen, halogen, C₁-C₆ alkyl, C₁-C₆haloalkyl, OR⁸, SR⁹, NHR¹⁰, COOR¹¹, COR¹², SO₂R¹³, NO₂ or CN; R³represents hydrogen, halogen, C₁-C₆ alkyl, C₁-C₆ haloalkyl, C₁-C₃ alkoxyC₁-C₃ alkyl, OR⁸, SR⁹, NHR¹⁰, COOR¹¹, COR¹², SO₂R¹³,C(R¹²¹)═C(R¹⁴)(R¹⁵), NO₂ or CN; R⁴ represents hydrogen, halogen, C₁-C₆alkyl, C₁-C₆ haloalkyl, C₁-C₃ alkoxy C₁-C₃ alkyl, OR⁸, SR⁹, NHR¹⁰,COOR¹¹, COR¹², SO₂R¹³, C(R¹²¹)═C(R¹⁴)(R¹⁵), C(R¹⁶)═NOR¹⁷, NO₂ or CN; R⁵represents hydrogen, halogen or C₁-C₃ alkyl; R⁶ represents C₁-C₃ alkylor C₁-C₃ haloalkyl; R⁷ represents hydrogen, halogen, or C₁-C₃ alkyl; andin which; R⁸represents hydrogen, a C₁-C₁₀ alkyl, C₁-C₁₀ haloalkyl, C₃-C₈alkenyl, C₃-C₈ haloalkenyl, C₃-C₈ alkynyl, C₃-C₈ haloalkynyl, C₃-C₁₀cycloalkyl, C₃-C₁₀ cyclohaloalkyl, C₃-C₁₀ cycloalkenyl, C₃-C₁₀cyclohaloalkenyl, C₃-C₁₀ cycloalkyl, C₁-C₃ alkyl, C₃-C₁₀ cyclohaloalkylC₁-C₃ alkyl, C₃-C₁₀ cycloalkenyl C₁-C₃ alkyl, C₃-C₁₀cyclohaloalkenylC₁-C₃ alkyl, C₁-C₅ alkylcarbonyl, C₁-C₅ haloalkylcarbonyl, C₃-C₆cycloalkylcarbonyl, C₃-C₆ cyclohaloalkylcarbonyl, C₁-C₆ alkylcarbonylC₁-C₆ alkyl, C₁-C₆ haloalkylcarbonyl C₁-C₆ alkyl, C₁-C₆ alkoxycarbonyl,C₁-C₆ haloalkoxycarbonyl, C₃-C₁₀ cycloalkoxycarbonyl, C₃-C₁₀cyclohaloalkoxycarbonyl, C₁-C₁₀ alkoxycarbonyl C₁-C₅ alkyl, C₁-C₁₀haloalkoxycarbonyl C₁-C₅ alkyl, C₃-C₁₀ cycloalkoxycarbonyl C₁-C₅ alkyl,C₃-C₁₀ cyclohaloalkoxycarbonyl C₁-C₅ alkyl, C₁-C₆ alkoxy C₁-C₆ alkyl,C₁-C₆ haloalkoxy C₁-C₆ alkyl, C₁-C₆ alkylthio C₁-C₆ alkyl, C₁-C₆haloalkylthio C₁-C₆ alkyl, cyano C₁-C₄ alkyl, phenyl that may have asubstituent or substituents, phenyl C₁-C₃ alkyl that may have asubstituent or substituents, phenylcarbonyl that may have a substituentor substituents, SO₂R²⁰, CH₂C(═O)CO₂R⁴¹, CH(CH₃)C(═O)CO₂R⁴¹,CH₂C(═NOR⁴²)CO₂R⁴¹ or CH(CH₃)C(═NOR⁴²)CO₂R⁴¹; R⁹ represents hydrogen,C₁-C₁₀ alkyl, C₁-C₁₀ haloalkyl, C₃-C₈ alkenyl, C₃-C₈ haloalkenyl, C₃-C₈alkynyl, C₃-C₈ haloalkynyl, C₃-C₁₀ cycloalkyl, C₃-C₁₀ cyclohaloalkyl,C₃-C₁₀ cycloalkenyl, C₃-C₁₀ cyclohaloalkenyl, C₃-C₁₀ cycloalkyl C₁-C₃alkyl, C₃-C₁₀ cyclohaloalkyl C₁-C₃ alkyl, C₃-C₁₀ cycloalkenyl C₁-C₃alkyl, C₃-C₁₀cyclohaloalkenyl C₁-C₃ alkyl, C₁-C₅ alkylcarbonyl, C₁-C₅haloalkylcarbonyl, C₃-C₆ cycloalkylcarbonyl, C₃-C₆cyclohaloalkylcarbonyl, C₁-C₆ alkylcarbonyl C₁-C₆ alkyl, C₁-C₆haloalkylcarbonyl C₁-C₆ alkyl, C₁-C₆ alkoxycarbonyl, C₁-C₆haloalkoxycarbonyl, C₃-C₁₀ cycloalkoxycarbonyl, C₃-C₁₀cyclohaloalkoxycarbonyl, C₁-C₁₀ alkoxycarbonyl C₁-C₅ alkyl, C₁-C₁₀haloalkoxycarbonyl C₁-C₅ alkyl, C₃-C₁₀ cycloalkoxycarbonyl C₁-C₅ alkyl,C₃-C₁₀ cyclohaloalkoxycarbonyl C₁-C₅ alkyl, C₁-C₆ alkoxy C₁-C₆ alkyl,C₁-C₆ haloalkoxy C₁-C₆ alkyl, C₁-C₆ alkylthio C₁-C₆ alkyl, C₁-C₆haloalkylthio C₁-C₆ alkyl, cyano C₁-C₄ alkyl, phenyl that may have asubstituent or substituents, phenyl C₁-C₃ alkyl that may have asubstituent or substituents, phenylcarbonyl that may have a substituentor substituents, CH₂C(═O)CO₂R⁴¹, CH(CH₃)C(═O)CO₂R⁴¹, CH₂C(═NOR⁴²)CO₂R⁴¹or CH(CH₃)C(═NOR⁴²)CO₂R⁴¹; R¹⁰ represents hydrogen, C₁-C₁₀ alkyl, C₁-C₁₀haloalkyl, C₃-C₈ alkenyl, C₃-C₈ haloalkenyl, C₃-C₈ alkynyl, C₃-C₈haloalkynyl, C₃-C₁₀ cycloalkyl, C₃-C₁₀ cyclohaloalkyl, C₃-C₁₀cycloalkenyl, C₃-C₁₀ cyclohaloalkenyl, C₃-C₁₀ cycloalkyl C₁-C₃ alkyl,C₃-C₁₀ cyclohaloalkyl C₁-C₃ alkyl, C₃-C₁₀ cycloalkenyl C₁-C₃ alkyl,C₃-C₁₀cyclohaloalkenyl C₁-C₃ alkyl, C₁-C₅ alkylcarbonyl, C₁-C₅haloalkylcarbonyl, C₃-C₆ cycloalkylcarbonyl, C₃-C₆cyclohaloalkylcarbonyl, C₁-C₆ alkylcarbonyl C₁-C₆ alkyl, C₁-C₆haloalkylcarbonyl C₁-C₆ alkyl, C₁-C₆ alkoxycarbonyl C₁-C₆haloalkoxycarbonyl, C₃-C₁₀ cycloalkoxycarbonyl, C₃-C₁₀cyclohaloalkoxycarbonyl, C₁-C₁₀ alkoxycarbonyl C₁-C₅ alkyl, C₁-C₁₀haloalkoxycarbonyl C₁-C₅ alkyl, C₃-C₁₀ cycloalkoxycarbonyl C₁-C₅ alkyl,C₃-C₁₀ cyclohaloalkoxycarbonyl C₁-C₅ alkyl, C₁-C₆ alkoxy C₁-C₆ alkyl,C₁-C₆ haloalkoxy C₁-C₆ alkyl, C₁-C₆ alkylthio C₁-C₆ alkyl, C₁-C₆haloalkylthio C₁-C₆ alkyl, cyano C₁-C₄ alkyl, phenyl that may have asubstituent or substituents, phenyl C₁-C₃ alkyl that may have asubstituent or substituents, phenylcarbonyl that may have a substituentor substituents, SR¹⁸, SOR¹⁹, SO₂R²⁰, CH₂C(═O)CO₂R⁴¹,CH(CH₃)C(═O)CO₂R⁴¹, CH₂C(═NOR⁴²)CO₂R⁴¹ or CH(CH₃)C(═NOR⁴²)CO₂R⁴¹; R¹¹represents hydrogen, C₁-C₁₀ alkyl, C₁-C₁₀ haloalkyl, C₃-C₁₀ alkenyl,C₃-C₁₀ haloalkenyl,C₃-C₁₀ alkynyl, C₃-C₁₀ haloalkynyl, C₃-C₈ cycloalkyl,C₃-C₈ cyclohaloalkyl, N(R²¹)(R²²), N═C(R²¹)(R²²), C₁-C₅ alkoxycarbonylC₁-C₃ alkyl or C₁-C₅ haloalkoxycarbonyl C₁-C₃ alkyl; R¹² representshydrogen, chlorine, C₁-C₅ alkyl, C₁-C₅ haloalkyl, C₃-C₆ cycloalkyl,C₃-C₆ cyclohaloalkyl or N(R²³)(R²⁴); R¹³ represents chlorine, C₁-C₁₀alkyl, C₁-C₁₀ haloalkyl, N(R²⁵)(R²⁶) or OR²⁷; R¹⁴ represents hydrogen,halogen or C₁-C₃ alkyl; R¹⁵ represents hydrogen, COOR²⁸, cyano or C₁-C₅alkyl; R¹⁶ represents hydrogen, C₁-C₄ alkyl, C₁-C₄ haloalkyl, C₃-C₅cycloalkyl or C₃-C₅ cyclohaloalkyl; R¹ ⁷ represents hydrogen, C₁-C₁₀alkyl, C₁-C₁₀ haloalkyl, C₃-C₆ cycloalkyl, C₃-C₆ cyclohaloalkyl, C₃-C₁₀cycloalkyl C₁-C₃ alkyl, C₃-C₁₀ cyclohaloalkyl C₁-C₃ alkyl, C₃-C₅alkenyl, C₃-C₅ haloalkenyl, C₃-C₅ alkynyl, C₃-C₅ haloalkynyl, C₁-C₅alkoxycarbonyl C₁-C₃ alkyl, C₁-C₅ haloalkoxycarbonyl C₁-C₃ alkyl, phenylthat may have a substituent or substituents or phenyl C₁-C₃ alkyl thatmay have a substituent or substituents; R¹⁸ represents C₁-C₁₀ alkyl,C₁-C₁₀ haloalkyl or phenyl that may have a substituent or substituents;R¹⁹ represents C₁-C₁₀ alkyl, C₁-C₁₀ haloalkyl, C₃-C₈ cycloalkyl, C₃-C₈cyclohaloalkyl or phenyl that may have a substituent or substituents;R²⁰ represents C₁-C₁₀ alkyl, C₁-C₁₀ haloalkyl, C₃-C₈ cycloalkyl, C₃-C₈cyclohaloalkyl or phenyl that may have a substituent or substituents;R²¹ represents hydrogen or C₁-C₅ alkyl; R²² represents hydrogen, C₁-C₅alkyl, C₁-C₈ haloalkyl or phenyl that may have a substituent orsubstituents; R²³ represents hydrogen, C₁-C₁₀ alkyl, C₁-C₁₀ haloalkyl,C₃-C₁₀ cycloalkyl, C₃-C₁₀ cyclohaloalkyl or phenyl that may have asubstituent or substituents; R²⁴ represents hydrogen, C₁-C₁₀ alkyl orC₁-C₁₀ haloalkyl; R²⁵ represents hydrogen, C₁-C₅ alkyl or C₁-C₅haloalkyl; R²⁶ represents hydrogen, C₁-C₁₀ alkyl or C₁-C₁₀ haloalkyl;R²⁷ represents hydrogen, C₁-C₁₀ alkyl; R²⁸ represents hydrogen, C₁-C₁₀alkyl, C₁-C₁₀ haloalkyl, C₃-C₁₀ cycloalkyl, C₃-C₁₀ cyclohaloalkyl orphenyl that may have a substituent or substituents; R⁴¹ representshydrogen, C₁-C₆ alkyl, C₁-C₆ haloalkyl, C₃-C₈ alkenyl and C₃-C₈ alkynyl,R⁴² represents hydrogen, C₁-C₆ alkyl, C₁-C₆ haloalkyl, C₃-C₈ alkenyl andC₃-C₈ alkynyl, and R¹²¹ represents hydrogen, chlorine C₁-C₅ alkyl, C₁-C₅haloalkyl, C₃-C₆ cycloalkyl or C₃-C₆ cyclohaloalkyl.
 2. The pyridazinonederivative recited in claim 1, wherein R¹ is hydrogen or halogen.
 3. Thepyridazinone derivative recited in claim 1, wherein R² is hydrogen orhalogen.
 4. The pyridazinone derivative recited in claim 1, wherein R¹and R² are halogen.
 5. The pyridazinone derivative recited in claim 1,wherein R⁵ is hydrogen or C₁-C₃ alkyl.
 6. The pyridazinone derivativerecited in claim 1, wherein R⁷ is hydrogen or C₁-C₃ alkyl.
 7. Thepyridazinone derivative recited in claim 1, wherein R⁶ is C₁-C₃haloalkyl.
 8. The pyridazinone derivative recited in claim 1, wherein R⁶is trifluoromethyl.
 9. The pyridazinone derivative recited in claim 3wherein R¹ and R² are chlorine and R⁶ is trifluoromethyl.
 10. Aherbicide comprising the pyridazinone derivative recited in claim 1 asan active ingredient and a herbicidally acceptable carrier therefor. 11.A method for controlling weeds which comprises applying an effectiveamount of a pyridazinone derivative as recited in claim 1 to weeds or alocus in which weeds grow or will grow.